The function of a VIAIR “H” model compressor is to fill tires with the use of an air line and an open-end air chuck. All “H” model compressors come with an onboard ON/OFF switch and are equipped with a stainless steel braided leader hose with an open-end quick connect stud installed at the end of the hose. All “H” model compressors must be installed using the appropriate gauge wiring for the distance from the intended power source and must be properly fused to protect the unit and the vehicle it is installed inside of. Most VIAIR compressors are equipped with a thermal overload protector that will shut down the unit when overheated. When cool, the compressor will automatically restart as normal.