400P-Automatic RV is VIAIR s first Automatic shut-off function portable compressor. This 33% duty cycle unit is capable of pressures up to 150 PSI and can be operated for up to 40 minutes at a time before needing to be rested. While the unit is intended for RV tires, it can be used for virtually any tire since it comes with more accessories for more varied inflating situations than any other portable compressor kit on the market today.VIAIR 400P Automatic RV portable compressors are shipped complete with a primary hose & an extension hose with a quick-connect coupling, a gas station-style air gun, a pressure gauge, 45 & 90 Tire chucks, an air filter element with replaceable air filtration media, a vibration-resistant sand tray, inflation tips and a deluxe carry bag for simple stowage and increased portability.