Smoke and Carbon Monoxide Detector Powered by Battery with Digital Display, Dual Alarm Sensor of Smoke and CO,Easy to Install

*SPECIFICATION* *Power supply: DC 4.5V (3*1.5V AA Batteries) * Standby current:?98uA *Alarm current: ?75mA *Alarm sound: ?85dB (1m) *Sensor type: Photoelectric sensor & Electrochemical CO senso *Low battery warning: <3.6V *Temperature range: 0°C~49°C (32°F~120°F) *Humidity: ?95%RH (No icing or condensation) *Dimension:?115(D) x 38(H)mm *Alarm sensitivity. CO alarm sensitivity & time: 70ppm, alarms within 60-180minutes; 150ppm, alarms within 10- 50minutes; 400ppm, alarms within 4-15minutes; 700ppm, alarms within 2-6minutes. *Executive criteria: UL217; BS5446