Auto EXPRESS 5 STARS BEST BUY TYRE INFLATOR 2008 and 2009. 12V air compressor inflates tyres quickly and automatically shuts-off when the desired preset air pressure is reached. This lightweight and compact unit will inflate a tyre in under 3.5 minutes displays the pressure reading in psi, bar or kpa. It also incorporates a bright work light with a selectable red light for warning or emergency use.