Note:this product not include the batteries Features: Model Number: TG105 Dial Diameter: 1.9 Inches Under Display Type: Digita Backlight:None Test range: 2.0-99.5 PSI OR 0.15-7.00 BAR Accuracy: +/-1.5PSI Resolution: 0.5PSI Units: PSI, BAR, KPA, Kg/cm2 Power supply: one 3V CR2032 battery ( not included) Product size: Approx.143*45*23mm Packing included:1*TG105 Car Tire Tyre Usage: 1. Power on the gauge, the last test result is displayed. Press the ON button for unit conversion (PSI - BAR - KPA - Kg/cm2). The simultaneous test of unit transformation shows that the value is changed accordingly. 2. The nozzles of the pressure gauge are aligned with the tire valve and tight pressure to ensure that the nozzle and valve are in good touch,and there is no hissing sound. After 3 seconds, remove the gauge from the valve and the accurate Vehicle Sensors Tire Pressure is read, and the data is kept for 15 seconds. After the data is zero, move the pressure gauge to the other tires to continue to test. 3.If gauge is not operated for 60 seconds, it will power off automatically. Or press ON key for 3 seconds to turn off the gauge. 1. Test Vehicle Sensors Tire Pressure value quickly. 2. LCD display, easy to read. 3. Automatically save current data for later reading.