Carbon Monoxide detector Operating voltage: DC4.5V(3 x AA )batteriesAlarm concentration: 50ppm, alarms within 60-90 minutes 100ppm, alarms within 10-40 minutes; 300 ppm, alarms within 3 minutes.Static current: <80úA, 200úA (LCD light)Alarm current:<80mAWorking range: Temperature : 4C-38C,Humidity: 25%-85%Alarm : sound level> 85Db/3KHz, red light flashStatic instruction : green right flash for 30 ...