Honeywell Home 5809SS Wireless Fixed Heat and Rate-of-Rise Temperature Sensor

Wireless fixed heat and rate-of-rise temperature sensor designed for fire detection in hard-to-wire locations. Features a built-in fixed temperature sensor that triggers an alarm at 135°F and a rate-of-rise sensor that detects temperature increases of 15°F or more per minute. Includes integrated transmitter for alarm, supervisory, and battery condition messages. Powered by 3V lithium battery with low battery alerts. Tamper switch provides trouble signal if unit is removed. UL Listed (UL 521) and CSFM approved for commercial and residential applications. Wall or ceiling mount. Fast, wire-free installation.