Description: Dial Tire Gauge Metal Air Pressure Truck Auto Car Bicycle Tester Meter Universal chuck measure many styles of tires, including: car, truck, bicycles, motorcycle, tractor, trailer. Pressure remains displayed until reset button is pressed. Perssure relief valve. Pressure remains displayed until reset button is pressed. A SAFETY must, helps you keep your tires inflated to the right pressure. Extends the life of your tires. Instructions for use: 1. The vehicle needs to be parked on a flat ground, and the tire pressure must be measured when the vehicle is cold; 2. First check whether the reading of the tire pressure gauge is at the "0" position, if not, press the button on the side of the tire pressure gauge to reset it; 3. Check the valve cover of the tire pressure first, and align the pressure measuring nozzle of the tire pressure gauge with the valve valve on the tire. The speed of entry needs to be fast, so as not to cause air leakage in the tire; 4. While pressing the tire pressure forcefully, observe whether the pointer is stable, pull out the tire pressure gauge quickly after the pointer is stable, and read (Generally, stable tire pressure readings can be obtained immediately); 5. Check the air pressure of the second tire at least every month. You can measure it several times before you are not familiar with the operation of the side tire pressure to make sure that the reading is correct! Precautions: Unit conversion 1kg/cm2=98kpa Normal maintenance of the car should be measured monthly--secondary tire pressure; Tire blowouts, fatigue driving and speeding are the three major killers of highway accidents that people recognize. packing list: 1*High-precision tire pressure gauge