Smoke Detector,stand Alone Photoelectric Smoke Detector, Alarm dimensions: 5.5" dia., 1.6" height,Operating voltage: DC 9V,Aud Smoke Detector Product featureso Features: 1) Alarm dimensions: 5.5" dia., 1.6" height2) Working current:a) Static current: ≤10μAb) Alarm current: ≤12mA3) Operating voltage: DC 9V4) Audio alarm: 85dB at 10 feet5) Temperature range: 14°F (-10°C) to147°F (60°C)6) Humidity ...