Longacre's digital tire pressure gauge may be the most user-friendly on the market. The auto-shutoff delay can be programmed up to 10 minutes, or it can be overridden, to allow the gauge to stay on until manually turned off (with a fresh battery, this can be several days). Units of measure are selectable between psi, Bar, Kg/cm2, and KPa. It can even be temporarily or permanently recalibrated in the field! Baclkit LCD display with battery life indicator reads to 125psi in 0.1psi increments. Features 17" hose with low-profile angled chuck and bleed valve. Includes 9 volt battery and foam-lined case.