... Multi -Use portable flammable gas detector is designed to detect Methane(Natural Gas),Butane,Propane ,LPG and LNG Multi-Use,Portable Gas DetectorBattery operation: 3V ... (2x1.5AAA)-no-includedDetector gas: Natural gas, propane, butane, LNG and LPG, etc.Alarm range: 0-10,000 (20%LEL ... on-less 500ppm)2: Yellow LED-low alarm-above 500ppm3:Red LED-high alarm-above 2000ppmOperation temperature: -10°C~+55 ...