Product Name: Tire pressure gauge (with gas) (gas to be connected to the gas pump Oh!) Product Features: Aluminum hand-made gun body, solid and durable, Applicable to small and medium-sized vans, motorcycles, cars. The vehicle tireswith inflatable, deflated and pressure detection function Measurement data, intuitive, fast, unit conversion PSI, BAR, Measuring range 0-220psi; 0- 16bar Market area: Car insurance, aftermarket, hardware, Instructions: 1 Unscrew the tires of the tire valve. 2 Tire the pressure gauge copper head into the tire mouth valve, tighten. 3 tire pressure gauge will show tire pressure. Inner circle black font is kilogram square centimeters, outer ring red font is pound square inch. 4 If the tire pressure is not enough, please add gas. If the tire pressure is too high, press the release valve, fine adjustment pressure. 5 measurement is completed, unscrew the copper head, press the release valve to the barometer pointer back to zero, twist the tire valve cover. note: 1 measure the tire pressure, the tire should be in a cooling state. 2 standard tire pressure, subject to the requirements of the manufacturer or tire manufacturer Return Policy All of our items come with a 30-day free return policy. If you need to return, please contact us, let us know the detailed problem and send us some pictures for confirmation. We reserve the right to refuse any returns for objective reasons. Shipping Policy All of our items are shipped free with tracking numbers. Orders will be shipped within 3 working days upon receipt of payment. Most orders will be shipped within 1 working day. In most cases, shipping takes 8-12 working days.