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 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 tire pressure value quickly. 2. LCD display, easy to read. 3. Automatically save current data for later reading. Specification: Product name: TG101 1. Measurement accuracy: +1psi 2. Resolution: 1psi 3.Measuring range; 1-150psi 0-10Bar 5-995Kpa 4. Power supply: button lithium battery 5. Working temperature: 0~50c 6.14.4*3.55*2.97cm Product List: 1x TG101 tire pressure gauge