Features and Benefits Large back-lit display is easy to read in both sunlight and low-light conditions Replaceable batteries (LR44 Alkaline) For measuring the air pressure of a car or truck tire from 2-150 PSI, +/- .5 PSI accuracy Four different units of measure (PSI, kPa, BAR, and kgf/cm2) Swivel extension for greater maneuverability in dual wheels, enabling easy checking of tire pressure from any angleThis durable and easy-to-use gauge displays pressure with a high degree of accuracy, ensuring longer tire life and improved gas mileage. Acme's digital dual foot service gauge measures 2 lbs. to 150 lbs with an easy to read back-lit LCD display. It is capable of four different units of measure. (PSI, kPa, BAR, and kg/cm2) It features a swivel extension for greater maneuverability in duel wheels. It also has replaceable batteries for the LCD. Made of durable construction.