This VacLife tire inflator can inflate tires in seconds. Just Plug it into the 12V power outlet in your car and attach the stem to the tire valve. You can pre-set the desired pressure level on the digital read-out and start inflating. The car air compressor will shut off automatically at the desired level so there is no need to worry about over inflating. It comes with a LED-lighting feature for any low-light environment. It also comes with an 11.9 ft power cord so you don’t have to unplug every time you switch from one tire to the other. There are four different nozzles will take care of all your inflating needs.