The Equip Air Compressor measures up to 150 p.s.i and works from standard 12v power. This product can also be plugged into the cigarette lighter socket for emergency use. The small size means this product is perfect for storing in the boot or footwell and can be used in emergencies or weekly car maintenance to ensure your tyres are the correct pressure. The large p.s.i range means this product can be used for a variety of applications such as cars, vans and bicycles.