The ELK-6052 Wireless Smoke Detector is designed for use with Elk's two-way wireless product line consisting of the ELK-M1XRFTW Transceiver and the ELK-M1 Control. It is intended for residential applications and incorporates many features designed to ensure its reliable performance. This smoke detector is provides a two-way solution with built-in sounder and wireless Sound Allactivation during an alarm. The unit utilizes photoelectric smoke detection technology, and also includes fixed temperature 135F heat detection and rapid "rate-of-rise" temperature detection. Built-in self-diagnostics monitors sensitivity and operation status.