Test tire pressure quickly Specifications: Color: Randomly sent Test range: 0-100 PSI Accuracy: +/-1.5PSI Resolution: 0.5PSI Units: PSI, BAR, KPA, Kg/cm2 Standard accessories: meter (without batteries) General description: Press ON key to turn on the gauge. Last test result is shown automatically Press ON key to select needed unit: PSI -BAR-KPA-Kg/cm2 Place the nozzle of the gauge onto tire valve. Press tightly, and make sure no hissing sound can be heard. Test for 3 seconds, move away from the gauge. Read the result. 15 sec later, LCD shows zero. Ready for test. If the gauge is not operated for 60 seconds, it will power off automatically. Or you can press ON key for 3 sec to turn off the gauge. Pack Includes: 1PC* Gauge of your choice.