Set the pressure you want and pull the trigger, it shuts off when that pressure is reached. Dead accurate with my Joe's Racing gauge! If it would let air out as necessary, it would be perfect! I have a half dozen Makita batteries left over from my real carpenter days so the $100 tool only price was barely palatable after smoking both Wallyworld and Amazon cigarette lighter versions in the less than a year. 3 year warranty on this and the warranty has already been confirmed online.
It actually fits in the glove box of my 65. I think after a few events my glove box would be toast though. Why can't you buy an ABS glove box liner?