Works great, pressure gauge turns on automatically when pressure is detected and turns off automatically. Surprised at how good it seemed for the cost, time will tell if it holds up. According to this gauge, I inflated all tires to 40psi. I just repaired a tire and checked it again in the morning to make sure it wasn't leaking. and the gauge I checked said it was 30psi! I couldn't believe it fell so hard so I pulled it back out just in case and it read 40psi. I couldn't believe the calibration was so far off. I checked my tire pressure with an auto TPMS and you know what. This unit was top notch, they were all 40psi. This accidentally diagnosed another gauge that was off by almost 10psi.
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