If you're an off-road racer, ATV trail guide, or just a driver with a daily commute, you don't want to have to worry about a deflated tire. Keep the Viair 87P Portable Air Compressor Kit in your trunk and your own peace of mind. This powerful portable compressor works for tires up to 31 inches big. Connect it to the vehicle battery, start your engine, connect it to the valve stem, and turn it on! Monitor the tire pressure with the 120 PSI mounted gauge. The compressor kit also includes a deluxe carry bag, pressure gauge, brass twist-on tire chuck, dual battery clamps with 20-amp inline fuse holder, 3 inflation tips, and an LED work light/ power indicator.