Dear，Pls leave a massage to tell us what design (Color) do you want.thank you.

Portable: PortableOuterID: 10804Tire pressure detectionOperation steps:1 tire valve cap screw.2 screw the tire pressure gauge into the nozzle (screw in)， tighten the valve.3 tire pressure gauge will display the tire pressure.4 if the tire pressure is insufficient， please air， such as the tire pressure is too high， please press the valve fine adjustment pressure.5 after the measurement， unscrew the copper head， press release valve， the pointer to zero. Screw back the original tyre valve cover.Pressure unit psi pressure range 0 - 60/0 - 100/0 - 150 precision +/-2%Pressure unit Kg/cm pressure range 0 - 4.2/0 - 7/0 - 10 precision +/-2%