The AUTO1000 Tyre Inflator is the first truly portable automatic tyre inflator with all the features of a larger wall mounted unit, connected to an air source, all you need to do is pre-set the required pressure, place the chuck on the tyre valve and the built-in auto start inflates/deflates the tyre to the specified pressure. Features: Two programmable pre-set Buttons, Multi scale gauge, Large LCD backlight digital screen, audible warning once pressure is reached, Auto ON once sensing tire pressure, auto OFF after 90 seconds, OPS Over Pressure setting, Lithium Ion Battery.