digital tire pressure gauge 150 psi 4 settings car truck bicycle backlit lcd

how to operate the digital tire gauge: press the switch and select psi or bar setting with led backlight for easy use at night place the nozzle of the gauge over the tire valve, press firmly to ensure good seal and prevent air escaping hold gauge on the valve until the led display locks remove the gauge quickly from the valve and read pressure gauge will automatically shut off 30s after use the gauge can be manually turned off by holding the switch down for more than 3s