Air when you need it. Plugs into car cigarette lighter for re-inflating flat tire. This mini 12-volt air compressor works off any automotive type cigarette lighter outlet. The pressure gauge shows 0 to 250 psi and 0 to 18 kg/cm. Maximum air pressure is 250 psi. Comes with 15" of airhose and a 12 ft. cord for a longer reach. Two air nozzles and one ball inflator needle included. Will inflate tires, air mattresses, pool toys, balls, and more. Economical enough to keep one in each of your vehicles & small enough to store anywhere.