REGISTRATION RIGHTS AGREEMENT

     THIS REGISTRATION  RIGHTS  AGREEMENT,  dated as of September 24, 1997 (this
"Agreement"), is made by and between ALCOHOL SENSORS INTERNATIONAL,  LTD., a New
York  corporation  (the  "Company"),  and the entity named on the signature page
hereto (the "Initial Investor").

                              W I T N E S S E T H:

     WHEREAS,  upon the terms and subject to the  conditions  of the  Securities
Purchase Agreement, dated as of September 24, 1997, between the Initial Investor
and the Company (the "Securities Purchase Agreement"), the Company has agreed to
issue and sell to the Initial Investor 300 shares (the "Preferred Shares") of 8%
Series B Convertible  Preferred  Stock,  $.001 par value, of the Company,  at an
aggregate  purchase price of $3,000,000,  which Preferred Stock (as that term is
defined in the  Securities  Purchase  Agreement) is  convertible  into shares of
Common Stock , $.001 par value, of the Company (the "Common Stock") and warrants
to purchase up to 50,000 shares of Common Stock (the "Warrants") ; and

     WHEREAS,  the shares of  Preferred  Stock are  convertible  into  shares of
Common  Stock  (the  "Conversion  Shares")  upon the  terms and  subject  to the
conditions of the  Certificate  of  Designations  (as defined in the  Securities
Purchase Agreement) and the Warrants may be exercised for the purchase of shares
of Common Stock (the  "Warrant  Shares")  upon the terms and  conditions  of the
Warrants; and

     WHEREAS,  to induce  the  Initial  Investor  to  execute  and  deliver  the
Securities  Purchase  Agreement,  the  Company  has  agreed to  provide  certain
registration rights under the Securities Act of 1933, as amended,  and the rules
and regulations thereunder, or any similar successor statute (collectively,  the
"Securities Act"), with respect to the Conversion Shares and the Warrant Shares;

     NOW,  THEREFORE,  in consideration of the premises and the mutual covenants
contained  herein and other good and  valuable  consideration,  the  receipt and
sufficiency  of which are  hereby  acknowledged,  the  Company  and the  Initial
Investor hereby agree as follows:

     1. Definitions.

     a. As used in this Agreement,  the following terms shall have the following
meanings:

     (i) "Investor" means the Initial  Investor and any permitted  transferee or
assignee  who agrees to become  bound by the  provisions  of this  Agreement  in
accordance with Section 9 hereof.

     (ii)  "Potential  Material  Event"  means  any of the  following:  (a)  the
possession by the Company of material  information  not ripe for disclosure in a



registration statement, which shall be evidenced by determinations in good faith
by the Board of Directors of the Company that disclosure of such  information in
the  registration  statement would be detrimental to the business and affairs of
the Company;  or (b) any material  engagement  or activity by the Company  which
would, in the good faith determination of the Board of Directors of the Company,
be adversely  affected by disclosure in a  registration  statement at such time,
which  determination  shall be accompanied by a good faith  determination by the
Board of  Directors  of the Company  that the  registration  statement  would be
materially misleading absent the inclusion of such information.

     (iii) "Register,"  "Registered," and "Registration" refer to a registration
effected by  preparing  and filing a  Registration  Statement or  Statements  in
compliance with the Securities Act and pursuant to Rule 415 under the Securities
Act or any  successor  rule  providing  for offering  securities on a continuous
basis ("Rule 415"),  and the  declaration or ordering of  effectiveness  of such
Registration  Statement by the United States Securities and Exchange  Commission
(the "SEC").

     (iv)  "Registrable  Securities" means the Conversion Shares and the Warrant
Shares.

     (v) "Registration  Statement" means a registration statement of the Company
under the Securities Act.

     b.  Capitalized  terms used herein and not otherwise  defined  herein shall
have the respective meanings set forth in the Securities Purchase Agreement.

     2. Registration.

     (a)  Mandatory  Registration.  The Company  shall prepare and file with the
SEC,  no later  than  thirty  (30) days  following  the  Closing  Date under the
Securities Purchase Agreement, either a Registration Statement on Form S-3 or an
amendment to any pending Company Registration  Statement on Form S-3 registering
for resale by the Investor  all of the  Registrable  Securities  (or such lesser
number as may be  required  by the SEC,  but in no event less than the number of
shares into which the  Preferred  Shares would be  convertible  and the Warrants
exercisable  at the time of  filing  of the  Form  S-3),  and such  Registration
Statement or amended Registration Statement shall state that, in accordance with
Rule 416 and 457 under the  Securities  Act, it also  covers such  indeterminate
number  of  additional  shares  of  Common  Stock as may  become  issuable  upon
conversion  of the Preferred  Shares and the exercise of the Warrants  resulting
from adjustment in the Conversion  Price, or to prevent dilution  resulting from
stock  splits,  or stock  dividends).  The Company shall use its best efforts to
cause the Registration  Statement to be declared  effective no later than ninety
(90) days after the Closing  Date. If at any time the number of shares of Common
Stock into which the Preferred Shares may be converted and which would be issued
upon exercise of the Warrants  exceeds the aggregate  number of shares of Common
Stock then  registered,  the Company shall,  within ten (10) business days after
receipt of a written notice from any Investor, either (i) amend the Registration
Statement  filed by the Company  pursuant  to the  preceding  sentence,  if such
Registration  Statement has not been declared effective by the SEC at that time,
to register  all shares of Common  Stock into which the  Preferred  Stock may be
converted, or (ii) if such Registration Statement has been declared effective by
the SEC at that time, file with the SEC an additional  Registration Statement on



Form S-3 to register the shares of Common Stock into which the Preferred  Shares
may be converted  and which would be issued upon  exercise of the Warrants  that
exceed the aggregate number of shares of Common Stock already registered.

     (b) Payments by the Company.

     (i) If the Registration  Statement  covering the Registrable  Securities is
not filed in proper form with the SEC within  thirty (30) days after the Closing
Date (the "Required Filing Date"),  the Company will make payment to the Initial
Investor in such  amounts and at such times as shall be  determined  pursuant to
this Section 2(b).

     (ii) If the Registration  Statement covering the Registrable  Securities is
not  effective  within the earlier of (a) five (5) days after  notice by the SEC
that it may be declared effective or (b) one hundred twenty (120) days following
the Closing Date (the "Required  Effective  Date"), or after a Suspension Period
(as defined below),  then the Company will make payments to the Initial Investor
in such  amounts  and at such  times  as shall be  determined  pursuant  to this
Section 2(b).

     (iii) The amount (the  "Periodic  Amount") to be paid by the Company to the
Initial  Investor  shall be determined as of each  Computation  Date (as defined
below) and such amount  shall be equal to (A) one percent  (1%) of the  purchase
price paid by the Initial  Investor  (the  "Purchase  Price") for all  Preferred
Shares  then  purchased  and  outstanding  pursuant to the  Securities  Purchase
Agreement for the period from the date following the Required Filing Date or the
Required  Effective Date, as the case may be, to the first relevant  Computation
Date,  (B) one percent (1%) to the next  Computation  Date,  and (C) two percent
(2%) to each  Computation  Date  thereafter.  By way of illustration  and not in
limitation of the foregoing,  if the Registration  Statement is timely filed but
is not declared  effective  until two hundred (200) days after the Closing Date,
the Periodic  Amount will  aggregate  four percent (4%) of the purchase price of
the Preferred Shares (1% for days 121-150, plus 1% for days 151-180, plus 2% for
days 181-200).

     (iv) Each  Periodic  Amount will be payable by the Company in cash or other
immediately available funds to the Investor upon demand of the Investor.

     (v) The parties  acknowledge  that the damages which may be incurred by the
Investor if the Registration  Statement is not filed by the Required Filing Date
or if the Registration Statement has not been declared effective by the Required
Registration  Date may be difficult  to  ascertain.  The parties  agree that the
Periodic Amount represent a reasonable  estimate on the part of the parties,  as
of the date of this Agreement, of the amount of such damages.

     (vi)  Notwithstanding  the  foregoing,  the amounts  payable by the Company
pursuant to this  provision  shall not be payable to the extent any delay in the
effectiveness  of the  Registration  Statement occurs because of an act of, or a
failure to act or to act timely by the Initial  Investor or its  counsel,  or in
the event all of the Registrable  Securities may be sold pursuant to Rule 144 or
another available exemption under the Act.




     (vii)  "Computation  Date"  means (i) the date which is the  earlier of (A)
thirty (30) days after the Required Filing Date and the Required Effective Date,
as the case may be,  or (B) the  date  after  the  Required  Filing  Date or the
Required  Registration  Date on which the Registration  Statement is filed (with
respect to payments due as  contemplated  by Section 2(b)(i) hereof) or declared
effective  (with  respect to payments due as  contemplated  by Section  2(b)(ii)
hereof),  as the case may be,  and (ii) each date  which is the  earlier  of (A)
thirty (30) days after the previous  Computation  Date or (B) the date after the
previous  Computation  Date on which the  Registration  Statement is filed (with
respect to payments due as contemplated by Section  2(b)(i)  hereof)or  declared
effective  (with  respect to payments due as  contemplated  by Section  2(b)(ii)
hereof), as the case may be.

     (c)  Underwritten  Offerings.  In the event that (i) the  Company  shall be
required to include in the Registration  Statement securities of the Company for
the  benefit  of  any  other   security   holder  of  the  Company  (the  "Other
Rightsholders")  pursuant to registration rights granted by the Company prior to
the date  hereof,  and (ii) the  managing  underwriter  or  underwriters  of the
proposed public offering of the Registrable  Securities of the Investors advises
the Company in writing that, as a result of the inclusion of such amount or kind
of securities of the Other  Rightsholders in such proposed public offering,  the
likelihood  of success of such public  offering  would be  materially  adversely
affected,  then the amount or kind of  securities to be offered for the accounts
of all Investors and the Other  Rightsholders  whose  securities are included in
the Registration  Statement shall be reduced pro rata to the extent necessary to
reduce the total amount or kind of securities of the Company being registered in
such  offering  to the amount and kind of such  securities  recommended  by such
managing underwriter or underwriters.

     3.  Obligations of the Company.  In connection with the registration of the
Registrable Securities, the Company shall do each of the following:

     (a) Prepare  promptly,  and file with the SEC by thirty (30) days after the
Closing Date, a Registration  Statement with respect to not less than the number
of Registrable  Securities  provided in Section 2(a),  above, and thereafter use
its reasonable  best efforts to cause each  Registration  Statement  relating to
Registrable  Securities  to become  effective  the  earlier of (a) five (5) days
after  notice by the SEC that it may be  declared  effective  or (b) ninety (90)
days  following the initial  Closing Date, and keep the  Registration  Statement
effective at all times until the earliest (the "Registration Period") of (i) the
date  that is two (2)  years  after  the  Closing  Date,  (ii) the date when the
Investors may sell all Registrable  Securities  under Rule 144 or (iii) the date
the  Investors  no  longer  own  any  of  the  Registrable   Securities,   which
Registration  Statement  (including any  amendments or  supplements  thereto and
prospectuses  contained  therein)  shall not contain any untrue  statement  of a
material fact or omit to state a material fact required to be stated  therein or
necessary to make the statements therein, in light of the circumstances in which
they were made, not misleading;

     (b) Prepare and file with the SEC such amendments (including post-effective
amendments)  and  supplements to the  Registration  Statement and the prospectus
used in connection with the  Registration  Statement as may be necessary to keep



the  Registration  effective at all times during the Registration  Period,  and,
during the Registration Period, comply with the provisions of the Securities Act
with respect to the  disposition  of all  Registrable  Securities of the Company
covered by the Registration Statement until such time as all of such Registrable
Securities  have been  disposed of in  accordance  with the intended  methods of
disposition  by the seller or sellers  thereof as set forth in the  Registration
Statement;

     (c) The Company  shall  permit a single firm of counsel  designated  by the
Initial  Investor to review the  Registration  Statement and all  amendments and
supplements  thereto a  reasonable  period of time (but not less than  three (3)
business  days) prior to their filing with the SEC, and not file any document in
a form to which such counsel reasonably objects;

     (d) Furnish to each Investor whose  Registrable  Securities are included in
the Registration  Statement and its legal counsel identified to the Company, (i)
promptly  after the same is prepared  and publicly  distributed,  filed with the
SEC, or received by the  Company,  one (1) copy of the  Registration  Statement,
each  preliminary  prospectus and  prospectus,  and each amendment or supplement
thereto, and (ii) such number of copies of a prospectus,  and all amendments and
supplements  thereto and such other  documents,  as such Investor may reasonably
request in order to facilitate  the  disposition of the  Registrable  Securities
owned by such Investor;

     (e) As promptly as practicable  after becoming aware of such event,  notify
each Investor of the happening of any event of which the Company has  knowledge,
as a result of which the prospectus included in the Registration  Statement,  as
then in effect,  includes  an untrue  statement  of a material  fact or omits to
state a material  fact  required to be stated  therein or  necessary to make the
statements  therein,  in light of the circumstances  under which they were made,
not  misleading,  and use its best efforts  promptly to prepare a supplement  or
amendment to the Registration Statement or other appropriate filing with the SEC
to correct such untrue statement or omission,  and deliver a number of copies of
such  supplement or amendment to each  Investor as such Investor may  reasonably
request;

     (f) As promptly as practicable  after becoming aware of such event,  notify
each Investor who holds  Registrable  Securities being sold (or, in the event of
an underwritten  offering, the managing underwriters) of the issuance by the SEC
of a Notice of Effectiveness or any notice of effectiveness or any stop order or
other  suspension  of the  effectiveness  of the  Registration  Statement at the
earliest possible time;

     (g)  Notwithstanding  the  foregoing,  if at any time or from  time to time
after the date of  effectiveness  of the  Registration  Statement,  the  Company
notifies  the  Investors  in writing of the  existence  of a Potential  Material
Event,  the Investors  shall not offer or sell any  Registrable  Securities,  or
engage  in any  other  transaction  involving  or  relating  to the  Registrable
Securities,  from the time of the giving of notice  with  respect to a Potential
Material Event until such Investor receives written notice from the Company that
such  Potential  Material  Event  either has been  disclosed to the public or no
longer  constitutes a Potential  Material  Event;  provided,  however,  that the
Company may not so suspend the right to such holders of  Registrable  Securities
for more than two twenty (20) day periods in the  aggregate  during any 12-month
period  ("Suspension  Period")  with at least a ten (10)  business  day interval



between such periods,  during the periods the Registration Statement is required
to be in effect;

     (h) Use its reasonable efforts to secure designation of all the Registrable
Securities  covered by the Registration  Statement on the "Small  Capitalization
Market" of the National  Association of Securities Dealers Automated  Quotations
System  ("NASDAQ")  within  the  meaning  of Rule  11Aa2-1  of the SEC under the
Securities  Exchange  Act of 1934,  as amended  (the  "Exchange  Act"),  and the
quotation of the Registrable  Securities on The NASDAQ SmallCap  Market;  or if,
despite the Company's  reasonable  efforts to satisfy the preceding clause,  the
Company  is  unsuccessful  in doing  so,  to secure  NASDAQ/OTC  Bulletin  Board
authorization  and  quotation  for  such  Registrable  Securities  and,  without
limiting the  generality  of the  foregoing,  to arrange for at least two market
makers to register with the National  Association  of Securities  Dealers,  Inc.
("NASD") as such with respect to such Registrable Securities;

     (i) Provide a transfer agent and  registrar,  which may be a single entity,
for  the  Registrable  Securities  not  later  than  the  effective  date of the
Registration Statement;

     (j)  Cooperate  with the Investors who hold  Registrable  Securities  being
offered to facilitate the timely  preparation and delivery of  certificates  for
the Registrable  Securities to be offered pursuant to the Registration Statement
and  enable  such  certificates  for the  Registrable  Securities  to be in such
denominations  or amounts as the case may be, as the  Investors  may  reasonably
request,  and,  within three (3) business  days after a  Registration  Statement
which  includes  Registrable  Securities  is ordered  effective  by the SEC, the
Company shall deliver,  and shall cause legal counsel selected by the Company to
deliver,  to the transfer agent for the Registrable  Securities  (with copies to
the Investors  whose  Registrable  Securities are included in such  Registration
Statement) an appropriate instruction and opinion of such counsel; and

     (k) Take all other reasonable  actions necessary to expedite and facilitate
disposition  by the  Investor  of the  Registrable  Securities  pursuant  to the
Registration Statement.

     4. Obligations of the Investors. In connection with the registration of the
Registrable Securities, the Investors shall have the following obligations:

     (a) It shall be a condition  precedent to the obligations of the Company to
complete  the  registration  pursuant  to this  Agreement  with  respect  to the
Registrable Securities of a particular Investor that such Investor shall furnish
to the Company such information  regarding  itself,  the Registrable  Securities
held by it, and the intended method of disposition of the Registrable Securities
held by it, as shall be reasonably  required to effect the  registration of such
Registrable  Securities and shall execute such documents in connection with such
registration as the Company may reasonably request. At least five (5) days prior
to the first anticipated filing date of the Registration Statement,  the Company
shall notify each  Investor of the  information  the Company  requires from each
such Investor (the "Requested  Information") if such Investor elects to have any
of  such  Investor's   Registrable   Securities  included  in  the  Registration
Statement.  If at least  two (2)  business  days  prior to the  filing  date the
Company  has  not  received  the  Requested  Information  from  an  Investor  (a



"Non-Responsive Investor"), then the Company may file the Registration Statement
without including Registrable  Securities of such Non-Responsive  Investor,  and
the  obligations  of  the  Company  with  respect  to  the  registration  of the
Registrable  Securities of the such  Non-Responsive  Investor shall be suspended
and the Company  shall not be liable for the  payments set forth in Section 2(c)
hereof for such period during which the Requested Information is not provided;

     (b)  Each  Investor  by  such  Investor's  acceptance  of  the  Registrable
Securities  agrees to cooperate with the Company as reasonably  requested by the
Company  in  connection  with the  preparation  and  filing of the  Registration
Statement hereunder, unless such Investor has notified the Company in writing of
such  Investor's  election  to  exclude  all  of  such  Investor's   Registrable
Securities from the Registration Statement; and

     c. Each Investor  agrees that,  upon receipt of any notice from the Company
of the  happening  of any event of the kind  described  in Section 3(e) or 3(f),
above,  such Investor will  immediately  discontinue  disposition of Registrable
Securities  pursuant to the  Registration  Statement  covering such  Registrable
Securities  until such Investor's  receipt of the copies of the  supplemented or
amended  prospectus  contemplated by Section 3(e) or 3(f) and, if so directed by
the Company,  such Investor  shall deliver to the Company (at the expense of the
Company) or destroy (and deliver to the Company a  certificate  of  destruction)
all  copies in such  Investor's  possession,  of the  prospectus  covering  such
Registrable Securities current at the time of receipt of such notice.

     5.  Expenses  of  Registration.   All  reasonable   expenses,   other  than
underwriting  discounts and commissions of the Investor,  incurred in connection
with  registrations,  filings  or  qualifications  pursuant  to  Section  3, but
including,  without limitation,  all registration,  listing,  and qualifications
fees,  printers and accounting  fees, the fees and  disbursements of counsel for
the Company.

     6. Indemnification. In the event any Registrable Securities are included in
a Registration Statement under this Agreement:

     (a) To the extent  permitted by law, the Company  will  indemnify  and hold
harmless each Investor who holds such Registrable Securities,  the directors, if
any, of such Investor,  the officers, if any, of such Investor,  each person, if
any, who controls any Investor  within the meaning of the  Securities Act or the
Exchange  Act,  against any losses,  claims,  damages,  liabilities  or expenses
(joint or several)  incurred  (collectively,  "Claims") to which any of them may
become subject under the Securities Act, the Exchange Act or otherwise,  insofar
as such Claims (or actions or proceedings,  whether commenced or threatened,  in
respect thereof) arise out of or are based upon any of the following statements,
omissions or violations in the  Registration  Statement,  or any  post-effective
amendment thereof, or any prospectus included therein:  (i) any untrue statement
or alleged  untrue  statement of a material fact  contained in the  Registration
Statement  or any  post-effective  amendment  thereof or the omission or alleged
omission  to state  therein a material  fact  required  to be stated  therein or
necessary  to make the  statements  therein  not  misleading,  (ii)  any  untrue
statement or alleged untrue  statement of a material fact contained in the final
prospectus  (as  amended or  supplemented,  if the Company  files any  amendment
thereof or supplement  thereto with the SEC) or the omission or alleged omission



to state  therein  any  material  fact  necessary  to make the  statements  made
therein,  in light of the circumstances  under which the statements therein were
made, not misleading or (iii) any violation or alleged  violation by the Company
of the Securities Act, the Exchange Act, any state securities law or any rule or
regulation  under the Securities  Act, the Exchange Act or any state  securities
law (the matters in the foregoing clauses (i) through (iii) being, collectively,
"Violations").  Subject  to clause  (b) of this  Section  6, the  Company  shall
reimburse the Investors,  promptly as such expenses are incurred and are due and
payable,  for any legal fees or other  reasonable  expenses  incurred by them in
connection  with  investigating  or  defending  any such Claim.  Notwithstanding
anything  to  the  contrary  contained  herein,  the  indemnification  agreement
contained in this Section 6(a) shall not (I) apply to a Claim  arising out of or
based upon a Violation  which  occurs in reliance  upon and in  conformity  with
information  furnished  in  writing  to the  Company  by or on  behalf  of  such
Indemnified  Party or  Indemnified  Person  (as such  terms are  defined  below)
expressly  for  use in  connection  with  the  preparation  of the  Registration
Statement  or  any  such  amendment  thereof  or  supplement  thereto,  if  such
prospectus  was timely made  available  by the Company  pursuant to Section 3(c)
hereof;  (II) be available to the extent such Claim is based on a failure of the
Investor to deliver or cause to be delivered the  prospectus  made  available by
the Company;  or (III) apply to amounts paid in  settlement of any Claim if such
settlement is effected  without the prior written consent of the Company,  which
consent shall not be  unreasonably  withheld.  Each Investor will  indemnify the
Company and its officers, directors and agents against any Claims arising out of
or based upon a Violation  which occurs in reliance upon and in conformity  with
information  furnished  in  writing  to the  Company,  by or on  behalf  of such
Investor,   expressly  for  use  in  connection  with  the  preparation  of  the
Registration  Statement,  subject  to such  limitations  and  conditions  as are
applicable  to the  Indemnification  provided by the Company to this  Section 6.
Such  indemnity  shall  remain  in  full  force  and  effect  regardless  of any
investigation  made by or on behalf of the Indemnified  Person and shall survive
the transfer of the Registrable  Securities by the Investors pursuant to Section
9.

     (b) Promptly  after receipt by an indemnified  person or indemnified  party
(each, an "Indemnified  Person" or "Indemnified  Party") under this Section 6 of
notice of the commencement of any action  (including any  governmental  action),
such  Indemnified  Person or  Indemnified  Party  shall,  if a Claim in  respect
thereof is to be made  against  any  indemnifying  party  under this  Section 6,
deliver to the indemnifying  party a written notice of the commencement  thereof
and the  indemnifying  party shall have the right to participate in, and, to the
extent the indemnifying  party so desires,  jointly with any other  indemnifying
party similarly  noticed,  to assume control of the defense thereof with counsel
mutually  satisfactory to the indemnifying  party and the Indemnified  Person or
the  Indemnified  Party,  as  the  case  may  be;  provided,  however,  that  an
Indemnified  Person or Indemnified  Party shall have the right to retain its own
counsel,  with the reasonable  fees and expenses to be paid by the  indemnifying
party,  if, in the reasonable  opinion of counsel  retained by the  indemnifying
party,  the  representation  by  such  counsel  of  the  Indemnified  Person  or
Indemnified  Party and the  indemnifying  party  would be  inappropriate  due to
actual or  potential  differing  interests  between such  Indemnified  Person or
Indemnified  Party and any other  person  represented  by such  counsel  in such
proceeding.  In such  event,  the  indemnifying  party  shall  pay for  only one
separate legal counsel for the  Indemnified  Party or Indemnified  Person;  such



legal counsel to be selected by the Indemnified Person or Indemnified Party, (I)
subject to the consent of the  indemnifying  party (which  consent  shall not be
unreasonably  withheld  or  delayed),  and (II) if the  Indemnified  Parties  or
Indemnified  Persons  are  Investors,  by the  Investors  holding a majority  in
interests of the Registrable  Securities included in the Registration  Statement
to which the Claim  relates.  Except as  provided in the  immediately  preceding
sentences,  in case any such action is brought against any Indemnified Person or
Indemnified  Party, and it notifies the  indemnifying  party of the commencement
thereof,  after notice from the indemnifying party to such Indemnified Person or
Indemnified  Party of the indemnifying  person's election so to assume (alone or
with other  indemnifying  persons) the defense thereof,  the indemnifying  party
will not be liable to such  Indemnified  Person or Indemnified  Party under this
Section 6 for any legal or other reasonable  out-of-pocket expenses subsequently
incurred by such Indemnified  Person or Indemnified Party in connection with the
defense  thereof  other  than  reasonable  costs of  investigation,  unless  the
indemnifying  party shall not defend such  action to its final  conclusion.  The
Indemnified  Person or Indemnified Party shall have the right to employ separate
counsel in any such  action and to  participate  in the  defense  thereof,  but,
except as provided above, the fees and reasonable out-of-pocket expenses of such
counsel  shall  not  be  at  the  expense  of  the  indemnifying  party  if  the
indemnifying party has assumed the defense of the action with counsel reasonably
satisfactory  to the  Indemnified  Person or Indemnified  Party.  The failure to
deliver written notice to the indemnifying party within a reasonable time of the
commencement of any such action shall not relieve such indemnifying party of any
liability to the Indemnified  Person or Indemnified  Party under this Section 6,
except to the extent that the indemnifying party is prejudiced in its ability to
defend such action. The indemnification required by this Section 6 shall be made
by  periodic   payments  of  the  amount   thereof  during  the  course  of  the
investigation or defense, as such expense, loss, damage or liability is incurred
and is due and payable.

     7. Contribution. To the extent any indemnification by an indemnifying party
is  prohibited  or limited by law,  the  indemnifying  party  agrees to make the
maximum contribution with respect to any amounts for which it would otherwise be
liable  under  Section  6 to the  fullest  extent  permitted  by law;  provided,
however,  that (a) no contribution shall be made under  circumstances  where the
maker would not have been liable for  indemnification  under the fault standards
set  forth in  Section  6; (b) no  seller of  Registrable  Securities  guilty of
fraudulent  misrepresentation  (within  the  meaning  of  Section  11(f)  of the
Securities Act) shall be entitled to contribution from any seller of Registrable
Securities  who was not  guilty of such  fraudulent  misrepresentation;  and (c)
contribution by any seller of Registrable  Securities shall be limited in amount
to the net amount of  proceeds  received  by such  seller  from the sale of such
Registrable Securities.

     8.  Reports  under  Exchange  Act.  With a view to making  available to the
Investors the benefits of Rule 144  promulgated  under the Securities Act or any
other  similar  rule or  regulation  of the SEC that may at any time  permit the
Investors to sell  securities of the Company to the public without  registration
("Rule 144"), the Company agrees to:

     (a)  make  and keep  public  information  available,  as  those  terms  are
understood and defined in Rule 144;




     (b) file with the SEC in a timely  manner all reports  and other  documents
required of the Company under the Securities Act and the Exchange Act; and

     (c) furnish to each  Investor  so long as such  Investor  owns  Registrable
Securities,  promptly upon request,  (i) a written statement by the Company that
it has complied with the reporting  requirements of Rule 144, the Securities Act
and the Exchange Act, (ii) a copy of the most recent annual or quarterly  report
of the Company and such other  reports and documents so filed by the Company and
(iii)  such  other  information  as may be  reasonably  requested  to permit the
Investors to sell such securities pursuant to Rule 144 without registration.

     9. Assignment of the  Registration  Rights.  The rights to have the Company
register   Registrable   Securities   pursuant  to  this   Agreement   shall  be
automatically  assigned by the Investors to any  transferee  of the  Registrable
Securities  (or all or any  portion of any  Debenture  of the  Company  which is
convertible  into such  securities)  only if: (a) the Investor agrees in writing
with the  transferee  or  assignee  to assign  such  rights,  and a copy of such
agreement  is  furnished  to the  Company  within a  reasonable  time after such
assignment,  (b) the Company is, within a reasonable time after such transfer or
assignment,  furnished  with written  notice of (i) the name and address of such
transferee  or  assignee  and (ii) the  securities  with  respect  to which such
registration rights are being transferred or assigned, (c) immediately following
such transfer or assignment the further  disposition  of such  securities by the
transferee or assignee is restricted  under the  Securities  Act and  applicable
state  securities  laws, and (d) at or before the time the Company  received the
written  notice  contemplated  by clause (b) of this sentence the  transferee or
assignee agrees in writing with the Company to be bound by all of the provisions
contained  herein.  In the event of any delay in filing or  effectiveness of the
Registration Statement as a result of such assignment,  the Company shall not be
liable for any damages  arising  from such delay,  or the  payments set forth in
Section 2(c) hereof.

     10. Amendment of Registration  Rights.  Any provision of this Agreement may
be amended and the observance  thereof may be waived  (either  generally or in a
particular  instance and either  retroactively or prospectively),  only with the
written  consent of the Company and  Investors  who hold an eighty (80%) percent
interest of the  Registrable  Securities.  Any  amendment or waiver  effected in
accordance  with this  Section 10 shall be binding  upon each  Investor  and the
Company.

     11. Miscellaneous.

     (a) A person or entity is deemed to be a holder of  Registrable  Securities
whenever such person or entity owns of record such  Registrable  Securities.  If
the Company receives conflicting instructions,  notices or elections from two or
more persons or entities with respect to the same  Registrable  Securities,  the
Company shall act upon the basis of  instructions,  notice or election  received
from the registered owner of such Registrable Securities.

     (b) Notices required or permitted to be given hereunder shall be in writing
and shall be deemed to be sufficiently given when personally delivered (by hand,



by courier,  by telephone line facsimile  transmission,  receipt  confirmed,  or
other means) or sent by  certified  mail,  return  receipt  requested,  properly
addressed  and with  proper  postage  pre-paid  (i) if to the  Company,  ALCOHOL
SENSORS INTERNATIONAL, LTD., 11 Oval Drive, Islandia, NY 11722, ATTN: President,
Telecopier No.: (516) 342-1550; with a copy to Morritt, Hock & Hamroff, LLP, 400
Garden City Plaza,  Suite 202, Garden City, New York 11530,  ATTN: Neil Kaufman,
Esq,  Telecopier No.:  (516)873-2010;  (ii) if to the Initial  Investor,  at the
address set forth under its name in the Securities  Purchase  Agreement,  with a
copy to Samuel Krieger,  Esq., Krieger & Prager, 319 Fifth Avenue,  Third Floor,
New York, NY 10016,  Telecopier No.: (212)  213-2077;  and (iii) if to any other
Investor, at such address as such Investor shall have provided in writing to the
Company,  or at such other address as each such party  furnishes by notice given
in accordance with this Section 11(b),  and shall be effective,  when personally
delivered,  upon receipt and, when so sent by registered or certified mail, four
(4) calendar days after deposit with the United States Postal Service.

     (c)  Failure  of any  party to  exercise  any right or  remedy  under  this
Agreement or otherwise,  or delay by a party in exercising such right or remedy,
shall not operate as a waiver thereof.

     (d) This Agreement shall be governed by and  interpreted in accordance with
the laws of the State of New York for  contracts to be wholly  performed in such
state and without giving effect to the principles thereof regarding the conflict
of laws. Each of the parties  consents to the jurisdiction of the federal courts
whose  districts  encompass any part of the City of New York or the state courts
of the State of New York sitting in the City of New York in connection  with any
dispute  arising under this Agreement and hereby  waives,  to the maximum extent
permitted by law, any  objection,  including  any  objection  based on forum non
coveniens, to the bringing of any such proceeding in such jurisdictions.

     (e) If any provision of this Agreement shall be invalid or unenforceable in
any  jurisdiction,  such  invalidity  or  unenforceability  shall not affect the
validity or enforceability of the remainder of this Agreement or the validity or
enforceability of this Agreement in any other jurisdiction.

     (f) Subject to the  requirements  of Section 9 hereof, this Agreement shall
inure to the benefit of and be binding upon the  successors  and assigns of each
of the parties hereto.

     (g) All  pronouns  and  any  variations  thereof  refer  to the  masculine,
feminine or neuter, singular or plural, as the context may require.

     (h) The headings in this  Agreement are for  convenience  of reference only
and shall not limit or otherwise affect the meaning thereof.

     (i) This  Agreement  may be executed in one or more  counterparts,  each of
which shall be deemed an original but all of which shall  constitute one and the
same agreement.  This Agreement,  once executed by a party,  may be delivered to



the other party hereto by telephone  line  facsimile  transmission  of a copy of
this Agreement bearing the signature of the party so delivering this Agreement.

     (j) The Company acknowledges that any failure by the Company to perform its
obligations  under Section 3(a) hereof,  or any delay in such performance  could
result in loss to the Investors, and the Company agrees that, in addition to any
other  liability  the Company may have by reason of such  failure or delay,  the
Company  shall be liable for all direct  damages  caused by any such  failure or
delay,  unless the same is the result of force  majeure.  Neither party shall be
liable for consequential damages.

     (k) This  Agreement  constitutes  the entire  agreement  among the  parties
hereto with respect to the subject  matter  hereof.  There are no  restrictions,
promises, warranties or undertakings,  other than those set forth or referred to
herein. This Agreement  supersedes all prior agreements and understandings among
the parties hereto with respect to the subject matter hereof. This Agreement may
be amended only by an  instrument  in writing  signed by the party to be charged
with enforcement thereof.

           [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]




     IN WITNESS  WHEREOF,  the parties  have caused  this  Agreement  to be duly
executed by their  respective  officers  thereunto duly authorized as of the day
and year first above written.

                                        ALCOHOL SENSORS INTERNATIONAL, LTD.

                                        By: s/Steven A. Martello
                                        Name:  Steven A. Martello
                                        Title:    President


                                        MILBRIGHT ESTATES LTD.

                                        By:  s/John Sansford
                                        Name:  John Sansford
                                        Title:    Director