9-Volt BO Photo Smoke-Alarm

First Alert brand smoke alarm. Features include photoelectric sensing technology, silence/test button, side battery drawer, blinking power indicator, missing battery guard: Drawer resists closing unless battery is inside, and tamper-resistant: Optional pin to lock battery unit in place. Ideal for cooking areas. 85dB alarm, 9V battery included. 10 year limited warranty. UL listed. Oregon and Vermont approved.