ITEM NAME:Tire Air Pressure Guage Digital Car Truck Bike Auto Meter LCD Tyre Gauge Te E1F1 Test range: 0-100 PSI Accuracy: Â ±1.5PSI Resolution: 0.05PSI Units: PSI, BAR, KPA, Kg/cm2 Press ON key to turn on the gauge. Last test result is shown automatically. Press ON key to select needed uit: PSI→BAR→KPA → Kg/cm2 Place gauge’s nozzle onto tire valve. Press tightly, make sure no hissing sound can be heard. Test for 3 seconds, move away the gauge. Read the result. 15 seconds later, LCD shows zero. Ready for another test. If gauge is not operated for 60 seconds, it will power off automatically. Or press ON ky for 3 seconds to turn off the gauge. Power supply: one 3V CR2032 battery Product size: 143x45x23mm Standard accessories: meter (with battery), manual Packaging includes: 1pc x Digital Tire Air Pressure Gauge.If gauge is not operated for 60 seconds, it will power off automatically. Or press ON ky for 3 seconds to turn off the gauge. Place gauge’s nozzle onto tire valve. Press tightly, make sure no hissing sound can be heard.