On/off power switch. All steel cabinet and fuel tank. Flame out shut-off. Overheat shut-off. U.L. listed large capacity motor. Air flow is 500 CFM. Digital diagnostics and LED temperature indicator, flat-free cold weather tires, extension cord wrap, tank drain plug, run time fuel gauge. 10 gallon fuel tank. Built-in thermostat. Multi-fuel use (i.e. Kerosene, Diesel No.1 and No.2, JP8, and Jet A fuel).