Shop Nilight Portable Air Compressor Tire Inflator 12V Heavy Duty 150PSI Metal Tire Pump Double Cylinder Digital Tire Pressure Fast Inflate Auto Shutoff Tire Pump for Car SUV Motorcycle in high quality, support 2 Years Warranty. Start car ignition, connect cigarette lighter plug to the 12V DC power outlet, connect the air hole to the tire; Set unit mode and desired value. Turn on the switch to start inflation, the air compressor will stop automatically when the preset value is reached.