Vintage Radio Shack Invisible Beam Intrusion Sensor 49-551A Alarm Infrared New

Vintage Radio Shack Pulsed Infrared Invisible Beam Intrusion Sensor model 49-551A Condition: New in open box. Sensor, all mounting hardware, and owner's manual included; sensor remains sealed in factory plastic. Box displays signs of age/storage including creases and minor wear at edges and corners—see photos for details. For use indoors with most burglar alarm panels. Includes sensor, reflector, installation hardware, and detailed instruction manual. Cat. No. 49-551A is custom manufactured in China for Radio Shack, a Division of Tandy Corporation, Fort Worth, TX. Features a pulsed infrared invisible beam designed for home security and indoor alarm systems. This U.L. listed household alarm component is compatible with most standard burglar alarm setups. Original packaging and components as shown. Great for collectors, vintage electronics enthusiasts, or restoration projects requiring period-correct alarm accessories.