This cool device does exactly what it says on the tin. It inflates a typical car, motorcycle or bicycle tire. It takes a little longer than one of the pumps you plug into the cigarette lighter, but you don't have to stand there and watch. You set the pressure you want and it stops when it reaches that pressure. I like that I don't have to untangle a long cord and plug it into an outlet. Fiddle to turn it off when you go to the other side and leave the car door open so you don't pinch the cord. Well you got the idea. This device defines comfort. and I can live with the fact that pumping up a tire takes a little longer than a good substitute for the inconveniences of a traditional compressor.