Combustible Gas Detector, Features Adjustable Sensitivity, Ambient Concentration Reset Function, Designed for One-Handed Operation, Low Battery Indicator, Replaceable Sensor, Self Test Sequence on Start-Up, Gases Detected Acetone, Alcohol, Ammonia, Benzene, Butane, Ethane, Gasoline, Industrial Solvents, Jet Fuel, Lacquer Thinner Methane, Methane, Naphtha, Paint Thinners, Propane, Includes Combustible Gas Leak Detector, Hard Carrying Case, Reference Leak Source