I was looking for a portable tire inflator that doesn't need to be plugged into the cigarette lighter socket, and this Merece tire inflator is not only cordless, it's faster than most cigarette lighter powered tire inflators! It inflated my truck tire from 19psi to 33psi in about 5 minutes! I love this tire inflator from Merece! The hose next to the compressor gets a little warm, but the device itself stays pretty cool. I highly recommend this machine, you will be completely satisfied.