Most fire victims have accidents at night in their own homes. The danger is not so much the fire itself, but the smoke. Smoke detectors save lives – the loud alarm will warn you in time of the fire hazard, even while you sleep, giving you the necessary advantage to get yourself and your family to safety. Photoelectric detector H-AL 13000 includes 1x 3V CR123A lithium battery (10 years), non-replaceable. Alarm sound for low battery status. Optical display (red) of the test function with a test button for functionality checks. Suitable for wall or ceiling mounting. Safety clip prevents installation without a battery. Height approximately 37 mm, diameter 100 mm. Includes mounting materials. IP20: for indoor use.