Method:1.Start the tire gauge; as the screen shows 8.8.8，press the starting up button2.Press the tire pressure gauge mouth to the tyre valve mouth， stay for a minute without air leakage.Then pull out the gauge mouth to tell the test result1KG/CM2=14.2PSI1KG/CM2=0.98BAR1KG/CM2=98.0KPA3.this product will automotive shut-off in half minutesAttention:Before every new test. Please restart the measure functionQuantity:1 PcNote: Due to the difference between different monitors， the picture may not reflect the actual color of the item. Thank you!Package includes:1 x Digital Tire Pressure Gauge