Early Alert Smoke Alarm Signal Extender - Sound Sensor

The Sound Sensor is the key component to an entire system designed to work with your existing smoke detectors. It listens for the sound of the alarm siren when triggered by a house fire, even from a location far from bedrooms, and sends it to a Receiver Speaker in each bedroom or optional window beacon or pathway light. Purchase 2 sensors and 1 Receiver/Speaker for every additional bedroom or space requiring coverage.