Digital Display & 85dB AlarmWhen combustible gas or carbon monoxide gas concentration is detected to reach the default value, the combination gas and carbon monoxide detector will display LEL or PPM, and at the same time, it will emit 85dB alarm sound.
2-in-1 Detection FunctionCan detect carbon monoxide gas and combustible gas; combustible gases include natural gas, LNG, LPG, propane, methane and etc