Align the pressure tap with the tire, and then squeeze it hard to keep the air tight. The tire pressure gauge will automatically display the reading. Measure tire pressure, gently press the power button, four units intelligent switch: 0-150psi, 0-10bar, 0-10kg / cm² , 0-1000kpa. Direct repeated measurement, no need to shut down to zero, standby 30 seconds automatically shut down or long press shutdown. Used for measurement of cars, bicycles, balls, rubber boats and other products. It has a wide range of applications and gives you a safe and healthy journey. This is a perfect car accessories gift for men and great as stocking stuffer.Please contact us if you have any questions, we are always here to satisfy all of you.