Honeywell Home 5815 Door/Window Transmitter

Compact door and window transmitter designed for discreet installations where aesthetics matter. Features dual reed switches for reliable entry detection and transmits supervisory, tamper, and low battery alerts. Delivers outdoor range exceeding one mile with proven performance in demanding installations. Includes supervised replaceable CR123 battery for extended operation. Dimensions: 3" H x 1-1/2" W x 7/8" D. Ideal for residential and commercial security applications requiring small-footprint protection without compromising reliability.