Combustible Gas Detector Detects Acetone Acetylene Alcohols Ammonia Benzene Butane Ethane Ethanol Ethylene Gasoline H.Sulfide Hydrogen Industrial Solvents ISO-Butane Methane Methyl Ether NOL Propane Toluene Xylene Alarm Indicator Features LCD and LED Dual Display Meets MSHA Approved Instrinsic Safety Certification Battery (4) AA Includes (4) AA Batteries Custom Hard Case Instruction Manual Test Vial Manufacturers Warranty Length 1 yr