HYLAN Electric Auto Pump provides you a more comfortable ride and improve fuel efficiency. It also provide security protection for your car. Specification: Working voltage: DC12V Rating power: 120W LED flashlight: Bright Torch Maximum Working Pressure 150 PSI 4 Display Units: KPA, PSI, BAR, KG/CM Overheat protector will shut of the unit when it exceeds 212°F CE certified Package Includes: 1*HYLAN Car Air Pump 3* Air Nozzles 1* Extra Fuse 1*User Manual Operating Instructions: 1. Make sure the power switch is at OFF position and the vehicle engine is running. 2. Remove the dust cap from the tire valve, and then attach the air chuck to the tire valve stem, and screw onto tire’s valve stem. 3. Plug the power cord into a 12V cigarette lighter socket. 4. Press (M) button to choose the display unit. (4 units available: PSI, KPA, BAR, KG/CM). Press (-) or (+) button to set the desired pressure, and then wait until it stops flashing. 5. Turn on the power switch. The compressor will automatically stop inflating once the desired pressure is reached. 6. When the desired pressure is reached, turn OFF the power. Valve connector detaching with desired pressure.