Product details INSTRUCTION This instrument is an ideal tool for measuring tire pressure and tire veins depth. It has the advantages of light weight and compact structure. It is very easy to use. You can use it to measure a vehicle's tire pressure and the tire veins depth for safe driving. FEATURES 2 IN 1, Measuring Tire Pressure and Tire Veins Depth DIGITAL LCD display with backlight easy to read Ergonomic design for comfortable hand fit SPECIFICATIONS Pressure Measurement Range: 3.0 ~ 99.5 PSI Pressure Measurement Accuracy: ±1/.5 PSI Pressure Measurement Resolution: 0.5 PSI Units: PSI, BAR,kPa, kg/cm2 Auto Power Off: about 85 seconds later Power Source: 1.5V (LR44)�2 pcs Dimensions(W�L�T): 50�135�32 mm Weight: 60g (with battery)