I got one of these bad boys about 10 years ago and was really impressed!! Well built and fastest car pump I have ever had.This is a bit bigger than standard 12v car dash power supply pumps so better suited for keeping in a garage or for the serious 4x4 user who wants to fill a tyre quick These are fully serviceable too, if you are practical/handy that is. I know because sadly, 2 years ago, the wire in mine broke as it enters the housing. I finally got round to fixing it and it's going a great again Best pump I ever had and will be going for years yet!