Combustible Gas Detector, Calibration Certificate Type Not Certified, Features Automatic Calibration, Low Battery Indicator, Gases Detected Acetone, Acetylene, Ammonia, Butane, Ethane, Ethanol, Gasoline, Isobutane, Methane, Propane, Includes Carrying Case, Maximum Operating Temperature 122 Degrees F, Minimum Operating Temperature -4 Degrees F, PPM Accuracy 5 ppm (Methane), PPM Detection Range 5 ppm (Methane), Probe Length 17 in, Overall Height 14 in, Manufacturer Warranty Length 2 yr