Exhibit 4(h) [American Medical Alert Corp. Letterhead] December 20, 1996 Mr. William F. Seegraber, Vice President VIA FAX 212 509-5150 Continental Stock Transfer & Trust Company HARD COPY TO FOLLOW 2 Broadway New York, NY 10004 Gentlemen: Reference is made to that certain Warrant Agreement between American Medical Alert Corp. (the "Company") and Continental Stock Transfer & Trust Company (the "Warrant Agreement"), dated September 23, 1992, with regard to the Common Share Purchase Warrants issued by the Company (the "Warrants"). The Warrant Agreement is hereby amended to provide that the expiration date of the Warrants is extended from December 27, 1996 until December 26, 1997. Very truly yours, AMERICAN MEDICAL ALERT CORP. By:/S/ HOWARD M. SIEGEL ----------------------- Howard M. Siegel President/CEO Agreed to: CONTINENTAL STOCK TRANSFER & TRUST CO. By:/S/ WILLIAM SEEGRABER ------------------------ cc: Corey Aronin, AMAC Parker Chapin Flattau & Klimpl