【EASY TO USE】：Plug Carsun portable car air compressor pump into the 12V power outlet and attach the hose to the tire you wish to inflate; set the default value, flip the switch and the car air compressor will do all the work for you. ?【AUTO SHUT OFF】：Before inflating, you can preset the pressure value, then the air compressor pump starts to work, when the inflating tire reaches the preset value, the car air compressor pump will automatically shut off. So, you do not have to worry about over inflating or low tire pressure anymore,convoy your safety all the way. ?【DIGITAL DISPLAY & LED LIGHTING】：Carsun portable air compressor pump is equipped with a large high-precision and high-brightness display to help you check the tyre pressure and preset the tyre presure values. The digital tire inflator is equipped with bright, long-lasting LED lights that can be easily used even in the dark, so you can re-inflate at night or quickly see it on dark, remote country roads. ?【MULTI-PURPOSE】：Carsun air compressor pump has a 10ft power cord and inflatable adaptors(3 additional nozzles) allowing to reach all tires of your car, bike, motor, ATV, compact or midsize Sedan, SUV, air mattress, inflatable boats, balls and other inflatables(but not support big Truck or Motor Lorry). Notice: * The car air pump only works with DC 12V power source. * To use the car air pump, start the engine before plugging in the power cord. * The car air pump is not applicable to LT, HT and Truck Tires. * After the car air pump is working for 8 minutes, make it turn off for 10 minutes. * Three meters long power cord , can be easily connected to the front and rear tires. * The default value of this air pump inflation default is 300PSI, if you want to set the default value adjustable button (+ The key is up, the -key is down.) * After setting the default value ,wait for 3 seconds , exit he preset mode, and detect the current air pressure in real time. General information: Product power: 120 W Operating voltage: DC12V Power cord length: 9.8 feet Weight: 1.8lb Size: 7.8 x 6.2 x 2.3 inches Maximum pressure: 300 PSI Power supply type:car cigarette lighter Continuous work time: 8 minutes Package Contents： 1 * air pump 3 * adapter