Combustible Gas Detector Detects Ammonia Butane Cyclopentane Ethane Ethanol Isobutane Methane Natural Gas Propane Accuracy 1 ppm Gasoline 5 ppm Methane Hydrogen Isobutane (R600a) Propane (R290) Audible Noise Multiple LEDs Indicator Battery (2) Duracell MN1300 D Alkaline Height 26 in Width 3 in Depth 3 in Includes (2) D-Size Batteries Hydrocarbon Gas Sensor Plastic Carrying Case Manufacturers Warranty Length 3 yr