Wireless Smoke Detector/Sensor Fire Alarm With 3V Battery

Technical index: working voltage: 3v alkaline battery or carbon-zinc battery standby current: no more than 10ma working current: no more than 40ma sensitivity of smoke: ii grade working temperature: -10 degree to 50 degree interface temperature of air: 10%-90% alarming sound: louder than 75db outer size: 107*44mm life of battery: more than 1 year reference standard: en 14604-2005