Dimensions: 4.75 in. x 2.25 in. (Diameter x Depth)
Enclosure: ABS plastic base with slip-resistant feet and 3 x AAA battery housing for optional audible message on button press Red, ABS plastic, spring-loaded push button
Electronic Signaling: Battery-powered filter circuit with integrated 433 MHz (crystal-controlled) DSC-compatible transmitter with 64-minute supervisory interval
Sensing Interface: Filtered, normally open (i.e. when not pressed), momentary contact switch
Battery Life: Replaceable 3x AAA battery: 2+ years