Product description:

Gas detected: Carbon monoxide

Electrochemistry type sensorPower

supply: AC220V/AC110V/12VDC/24VDC(optional)
Backup battery: 9V ordinary battery
Working environment:
    Humidity: 25%-85%  
    Temperature: 0℃-50℃
Additional function: can work with exhaust fan and solenoid value or manipulator(Optional)

Alkaline Battery life: about half a year 
Static current: ≤140μA
Alarm current: 60MA
Alarm volume: 85dB                             
The responding time of this CO alarm fully comply with the EN50291 or CN specifications