ELK319GB
Know when your window has been broken by an intruder by installing the Elk Wireless Glass Break Sensor, 319.5 MHz. Featuring selectable sensitivity functionality and a built-in tamper switch, this wireless glass break sensor operates on the 319.5 MHz frequency and works with Elk's M1 controls and other popular systems. Additionally, this sensor features a maximum sensor range of 20 feet and provides alarm, tamper, and low battery signal transmissions. It's powered by (2) replaceable 3VDC lithium batteries, which are included.