• High-sensitive detection for fuel gas and CO 
• Double sensor inside, can detect carbon monoxide, LNG, LPG, etc. a variety of gases
• When carbon monoxide exceeds or detects combustible gas leakage, the screen will display the current value according to the gas concentration
• The detector will send a voice "carbon monoxide exceeds, please open the doors and windows" or "please notice the combustible gas leakage" prompt, and sound an alarm when carbon monoxide exceeds or detects a combustible gas leak
• Easy installation, powered by rechargeable 9V battery or connect the AC 220V plug with the socket then it can work

Specifications:

• Working voltage: AC 90-230V (EU plug/US plug)
• Battery: 9V battery (not included)
• Working temperature: 0-50 degrees Celsius
• Warm-up time: about 180s
• Environmental humility: 10%-95%
• Sound level: 85dB/m
• Alarm concentration display
• Carbon monoxide gas: 100 PPM~999 MM (±50 PPM)
• Combustible gas: 0.25%~2% LEL (25500 PPM~20000 PPM±1500 PPM)
• Alarm: human voice prompt and siren alarm