EXHIBIT 26.2

                                                February 6, 2009

Napco Security Technologies, Inc.
f/k/a Napco Security Systems, Inc.
333 Bayview Avenue
Amityville, New York

     Re: Amended and Restated Credit Agreement dated August 18, 2008

Ladies and Gentlemen:

We refer to the referenced agreement between you and the undersigned Lenders and
Administrative  Agent as most recently amended by a Second Amendment and Waivers
dated as of January 29, 2009 (collectively, the "Credit Agreement"). Capitalized
terms used herein without  definition  have the meanings  ascribed in the Credit
Agreement.

Section 8.1 (a) (i) of the Credit Agreement  required  maintenance of a ratio of
Consolidated  Funded Debt to Consolidated EBITDA of not more than 3.5 to 1.0 for
the Trailing  four quarter  period which was not  maintained  as at December 31,
2008.

Section  8.1  (b)  of  the  Credit  Agreement  required  the  Borrower  and  its
Consolidated  Subsidiaries to maintain a minimum Debt Service  Coverage Ratio of
at  least  1.25  to 1.0 for the  Trailing  four  quarter  period  which  was not
maintained as at December 31, 2008.

Section  8.1  (c)  of  the  Credit  Agreement  required  the  Borrower  and  its
Consolidated Subsidiaries to maintain a Modified Quick Ratio of at least 1.15 to
1.0 for the Trailing four quarter period which was not maintained as at December
31, 2008.

The Banks hereby  waive  non-compliance  with the  foregoing  covenants  for the
above-referenced period as follows:

     (1)  Section  8.1 (a) (i) of the Credit  Agreement  requiring  the ratio of
Consolidated Funded Debt to Consolidated EBITDA to be no greater than 3.5 to 1.0
to the extent of  non-compliance  for the  Trailing  four  quarter  period ended
12/31/08 solely to the extent such ratio was 6.29 to 1.0 instead of the required
ratio (For purposes of calculating  Consolidated EBITDA, the definition has been
expanded as follows:  "Consolidated  EBITDA": for any period of four consecutive
fiscal  quarters,  the sum of (i)  Trailing  Consolidated  Net  Income  for such
period,  plus  non-recurring  and  non-cash  losses (net of tax for such period)
minus  non-recurring  and non-cash  gains (net of taxes for such  period),  (ii)
Trailing  Consolidated  Interest  Expense for such period and (iii) the Trailing
amount of  taxes,  depreciation  and  amortization  deducted  from  earnings  in
determining such Consolidated Net Income. FOR PURPOSES OF THIS CALCULATION,  THE
FIRST POST-ACQUISITION QUARTER OF MARKS CONSOLIDATED EBITDA FOR THE THREE MONTHS
ENDED DECEMBER 31, 2008 WILL BE ADDED TO THE PRE-ACQUISITION CONSOLIDATED EBITDA
OF MARKS FOR THE THREE QUARTERS ENDED JULY 31, 2008;

     (2)  Section 8.1 (b) of the Credit  Agreement  requiring  the Debt  Service
Coverage Ratio of the Borrower and its Consolidated  Subsidiaries to be at least
1.25 to 1.0 to the extent of non compliance for the Trailing four quarter period
ended  12/31/08  solely to the extent  such ratio was 1.08 to 1.0 instead of the
required ratio (For purposes of defining  Consolidated Cash Flow, the definition
has been expanded as follows:  "Consolidated  Cash Flow": for any period of four
consecutive fiscal quarters, net income, plus, without duplication, depreciation
plus amortization of intangibles, minus capital expenditures, plus non-recurring
and non-cash losses (net of tax) minus  non-recurring and non-cash gains (net of
taxes), in each case, of the Borrower and its Consolidated Subsidiaries with all
accounting  terms  defined in  accordance  with GAAP,  based upon receipt of the
quarterly  and/or  annual  financial  statements.  For the  avoidance  of doubt,
non-recurring  and  non-cash  losses  must  occur  together  to be  added to the
equation,  and  non-recurring  and  non-cash  gains  must occur  together  to be
subtracted  from the  equation.  FOR  PURPOSES  OF THIS  CALCULATION,  THE FIRST
POST-ACQUISITION  QUARTER OF MARKS  CONSOLIDATED  CASH FLOW FOR THE THREE MONTHS
ENDED DECEMBER 31, 2008 WILL BE ADDED TO THE  PRE-ACQUISITION  CONSOLIDATED CASH
FLOW OF MARKS FOR THE THREE QUARTERS ENDED JULY 31, 2008); and



     (3) Section 8.1 (c) of the Credit  Agreement  requiring the Modified  Quick
Ratio of the Borrower and its  Consolidated  Subsidiaries to be at least 1.15 to
1.0 to the extent of non  compliance  for the Trailing Four Quarter period ended
12/31/08 solely to the extent such ratio was 1.06 to 1.0 instead of the required
ratio.

     The waivers  described  above are  effective  only in this instance for the
purpose given, are limited to the circumstances and conditions set forth herein,
and shall not be deemed to be a  continuing  or  further  waiver of these or any
other  covenants,  terms or  provisions  of the Credit  Agreement.  The  waivers
described  above will expire by their terms on March 15, 2009 unless  reaffirmed
on or prior to such date by the Required Lenders. No waiver of any single breach
or  default  under the  Credit  Agreement  shall be deemed to be a waiver of any
other breach or default thereunder.  It is understood that all covenants,  terms
and conditions of the Credit Agreement  remain  unmodified and in full force and
effect.

     In  consideration  of the grant of the above waivers,  Borrower agrees that
effective  as of the date  hereof  the  definitions  of  "Consolidated  EBITDA",
"Consolidated  Cash Flow" and "LIBOR Rate" set forth in the Credit Agreement are
modified to read as follows:

     "Consolidated  EBITDA": for any period of four consecutive fiscal quarters,
     the sum of (i)  Trailing  Consolidated  Net  Income for such  period,  plus
     non-recurring  and  non-cash  losses  (net of tax for  such  period)  minus
     non-recurring  and  non-cash  gains  (net of taxes for such  period),  (ii)
     Trailing  Consolidated  Interest  Expense  for such  period  and  (iii) the
     Trailing  amount of taxes,  depreciation  and  amortization  deducted  from
     earnings in determining such Consolidated Net Income.) FOR PURPOSES OF THIS
     CALCULATION,  CONSOLIDATED  EBITDA WILL INCLUDE MARKS  CONSOLIDATED  EBITDA
     PRIOR TO THE ACQUISITION  DATE TO THE EXTENT  NECESSARY TO REFLECT A FULL 4
     QUARTERS OF MARKS USA CONSOLIDATED EBITDA.

     "Consolidated  Cash  Flow":  for  any  period  of four  consecutive  fiscal
     quarters,   net  income,  plus,  without  duplication,   depreciation  plus
     amortization of intangibles, minus capital expenditures, plus non-recurring
     and non-cash  losses (net of tax) minus  non-recurring  and non-cash  gains
     (net of  taxes),  in  each  case,  of the  Borrower  and  its  Consolidated
     Subsidiaries  with all  accounting  terms defined in accordance  with GAAP,
     based upon receipt of the quarterly and/or annual financial statements. For
     the  avoidance  of doubt,  non-recurring  and  non-cash  losses  must occur
     together to be added to the equation,  and non-recurring and non-cash gains
     must occur together to be subtracted from the equation.FOR PURPOSES OF THIS
     CALCULATION,  CONSOLIDATED  CASH FLOW WILL INCLUDE MARKS  CONSOLIDATED CASH
     FLOW PRIOR TO THE  ACQUISITION  DATE TO THE EXTENT  NECESSARY  TO REFLECT A
     FULL 4 QUARTERS OF MARKS CONSOLIDATED CASH FLOW.



          "LIBOR  Rate":  with respect to any  Eurodollar  Loan for any Interest
     Period, the greater of (i) 2% per annum or (ii) the rate per annum (rounded
     upward, if necessary,  to the nearest 1/32 of one percent) as determined on
     the basis of the offered rates for deposits in U.S.  dollars,  for a period
     of time  comparable to such  Interest  Period which appears on the Telerate
     page 3750 as of 11:00  a.m.  London  time on the day that is two (2) London
     Banking Days  preceding the first day of such  Eurodollar  Loan;  provided,
     however, if the rate described above does not appear on the Telerate System
     on any applicable  interest  determination date, the rate shall be the rate
     (rounded  upwards as described above, if necessary) for deposits in dollars
     for a period  substantially equal to the Interest Period on the Reuter Page
     "LIBO" (or such other page as may replace the LIBO Page on that service for
     the purpose of displaying such rates),  as of 11:00 a.m.  (London Time), on
     the day that is two  London  Banking  days prior to the  beginning  of such
     Interest Period. "Banking Day" shall mean, in respect of any city, any date
     on which commercial banks are open for business in that city.

Please indicate your consent and agreement to the amendment set forth in the
last paragraph above by signing and dating a copy of this letter.

                                               Very truly yours,

                                               CAPITAL ONE, N.A.

                                               By: /s/STEVEN RATNER
                                                   -----------------------------
                                               Name: Steven Ratner
                                               Title: Senior Vice President


                                               HSBC BANK USA, NATIONAL
                                               ASSOCIATION, as Administrative
                                               Agent and as a Lender

                                               By: /s/GARY SARRO
                                                   -----------------------------
                                               Name: Gary Sarro
                                               Title: First Vice President

The Borrower and Guarantors under the Credit
Agreement acknowledge and consent to the
amendment of the definition of LIBOR Rate
set forth above.

Borrower:

NAPCO SECURITY TECHNOLOGIES, INC.
f/k/a Napco Security Systems, Inc.

By: /s/KEVIN S. BUCHEL
    ----------------------------
       Kevin S. Buchel
       Senior Vice President of
       Operations and Finance



Guarantors:
ALARM LOCK SYSTEMS, INC.

By: /s/KEVIN S. BUCHEL
    --------------------------------
Name: Kevin S. Buchel
Title: Senior Vice President

CONTINENTAL INSTRUMENTS, LLC

By: /s/KEVIN S. BUCHEL
    --------------------------------
Name: Kevin S. Buchel
Title : Manager