Features: 1.On/off valve controlling the filling of tank 2.Air gauge tells you the air volume accurately 3.Automatic control barometric pressure function 4.Simple plug-in and ready to use 5.Durable solid steel plate construction 6.Design for seating tires on bead of rim simple, safe and fast 7.Seating all tires of heavy duty vehicle including ATV, tractor, cars, truck…etc. .