... Voltage:12V 2,Detected gas:LPG,LNG,CNG 3,Sound:85dB/3 meter 4,To prevent gas leaking,shut off gas source in car ... 5,MOQ:1pc 1: Detect propane, butane, methane,LPG: Widely used ... consists of detector and controller, when detector detects gas leakage will be passed to control signal, then ... than ±3%LEL Power: <1.5W Car gas alarm with shut-off valve