1,Voltage:12V 2,Detected gas:LPG,LNG,CNG 3 ... butane, methane,LPG: Widely used in Car, Garage 2: Master conncected Max. 3 sensors Comfort equipment though gas ... 99mmX66mm Technical Data in Detector Service Voltage: DC12V Range of Working Voltage: DC9V~DC18V Relative humidity: <93%RH ... for repetitiveness testing of alarm concentration is not more than ±3%LEL Power: <1.5W China manufacturer of car gas alarm ...