300P is a larger portable compressor kit that is capable of inflating up to 33-inch tires easily by simply clamping the power leads to your battery, connecting the tire chuck to the valve stem and turning the unit on. Tire pressure can be checked using the 5-in-1 Inflator/Deflator inline pressure gauge. Vibration Isolators 3 pc. Inflation Tips Kit Accessory Power Plug Deluxe Carry Bag Installation Instructions .