Item Detail: Excellent Quality Easy to use Plugs into your car cigarette lighter Includes universal adapter valve 2 nozzle adaptors, 1 sports needle. Equipped with pressure gauge 300 psi 12v Air Compressor for re-inflating tyres etc. With quick-release valve connection and high-pressure hose. Plugs into a 12V cigarette lighter socket. Usage is very simple, there isn’t even an on/off switch. Just connect the 12V plug to the car’s cigarette lighter connection and the quick release air hose to the tyre. The compressor will then begin inflating the tyre. Simply disconnect the hose when the correct tyre pressure is shown on the dial.