Air Chuck with 4 Measurement Units Specification: Measurement Units: PSI, KPA, Bar, Kg/cm² Accuracy: +/-1% , Display Resolution: 0.1 PSI Display Type: LCD , Auto Power-Off: 20 Sec Operating Temperature: -4°F to 122°F Compatibility: 1/4'' NPT air compressor Hose / Air Hose Quick Connect Coupler Auto Wake-up when sense pressure: Yes High Flow Air Hose (Installed): 12.5'' Inflating Tires The digital tire inflator gauge makes filling tires extremely this tire gauge well connected with an air compressor and your tire valve, then inflate your tire by pushing inflation trigger continuously, until pressure reaches the a tire twice as quickly or even faster by using fewer instruments. Simply press the handle of the tire inflator gauge down, the tire will be inflated to the exact pressure you need on your first try! Pressure Check Unscrew the end caps on your tires' air valves. Press the tire gauge onto the valve, then press the "ON" button to check tire pressure. And a bright backlit LCD display ensures clear readings in any light condition, even in darkness.Professionally calibrated to always return a reading within 1% of the exact pressure of your tire and 0.1 display resolution. No more guessing. Deflate Tires Built-in air bleeder valve helps to quickly decrease pressure in overinflated tires. Decreasing the likelihood of flats, explosions, and crashes. Press the air bleeder valve to drain excessive air pressure. Note: Don’t count on the tire pressure tested during deflating. After deflating, the static tire pressure is the current pressure.