Combustion Analyzer, Residential, Fuel Type Bio Oil, Butane, Heavy Oil, Light Oil, LPG, Natural Gas, Pellets, Propane, Combustion Efficiency 0 to 99.9 Percent, Oxygen Concentration 0 to 21 Percent, Carbon Dioxide Concentration 0 to 20 Percent, Display 6-Line LCD, Battery Type (3) AA Rechargeable, Includes Cone and Hose (CP2), Flue Probe, USB Charging Cable, Manufacturers Warranty Length 1 yr Extended Up to 6 Years with Annual Re-certification