LOVNOV portable air compressor is very useful and convenient.Not to mention timely. You could inflate the tire at all times and places whenever the sensor on my dash told you it needed it. If you used an old air compressor, you have to plug it into the cigarette lighter port (or what used to be called that) and then run the compressor with its power cord over the door edge and out to the tire. The LOVNOV takes all of that hassle out of the equation because it holds a charge. It also has the ability to sense when maximum air pressure has been reached and shuts off automatically. If you live in a hot place, so to be able to set up the LOVNOV, get it started, and get back in the air-conditioned car while you wait is very much appreciated. Overall, the LOVNOV is very much worth the purchase. It is the best gift for younger drivers because it provides peace of mind in addition to its normal functions.