Photoelectric Smoke Alarm (smoke detector, lighting) 1. Escape Light Photoelectric Smoke Alarm with Escape Light( smoke detector, lighting)1. High intensity escape light beam powered by alkaline battery2. Can also be used to ... battery missing warning indicator11. Auto-reset when smoke clears12. CE, BSI, SAI global TUV approved, Complies with EN14604, AS3786, and UL217 standard