Smoke alarm,Gas alarm,Carbon monoxide alarm(3 in 1) - CE,CCC,ISO9000 certificated - High quality with best price - Hot seller Smoke alarm, Gas alarm, Carbon monoxide alarm(3 in 1 ... )Feature:1.Working voltage: AC220-240V,AC110-130V2.Power consume: ≤2W3.Alarm sound: ≥100dB4 ...