PROCESS LEVEL ACCURACY: This heavy duty tire pressure gauge is calibrated manually to ANSI B40.1 Grade A (plus-minus 1% of span) PRESSURE RANGE 0-75 PSI: ETENWOLF’s tire gauge can measure pressure of pickup, motorcycle, truck, bike, SUV, RV or ATV EASY TO READ IN THE DARKNESS: The large glow dial helps you clearly read the pressure at night or in low light EASY TO USE: 360 degree swivel chuck allows you to measure and take a reading from a tire valve at any angle ACCURACY IN EXTREME WEATHER: PSI gauge works normally even in extreme cold or hot weather