Shop Nilight Tire Inflator Portable Air Compressor Battery Powered Rechargeable 12VDC 150PSI Cordless Air Pump w/Digital Pressure Gauge 2X Faster Inflation 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, set the desired value, and wait for the numbers to stop blinking. Turn on the switch, the air compressor will stop automatically when the preset value is reached.