YALE EF-SD Easy Fit Wirefree Optical Smoke Detector - With Hush Facility

A wire free optical smoke detector for use with the Yale Easy Fit range of alarms. Once the concentration of the smoke exceeds the set threshold value, the Smoke Detector transmits a signal to the control panel. After the transmission is completed, the smoke detector then activates its local built-in buzzer with the LED flashing. It will check the smoke concentration every 10 seconds, and should it be over the threshold it will continue the local siren warning. Activates your house alarm in the event of a fire Built in siren that sounds on the device when smoke is detected LED Light 10 Minute hush facility