200PSI Tire Pressure Gauge Monitoring LCD Digital Display Inflator with LED Light for Car Auto Motorcycle Item Type: Tire Air Pressure Gauge Material: Aluminum Alloy, Copper, Rubber Display Mode: LCD digital display Pressure Unit: PSI, KPa, Bar, Kgf/CM² Measuring Range: 3-200PSI/14BAR/14Kgf/cm² Measurement Accuracy: 3-100PSI: ±1PSI, over 100PSI: ±2PSI Working Temperature: -20℃-60℃ Key Functions: Switch key (left), unit switch key (right) Battery: 2 x AAA batteries 1.5v (not included) Working Current: ≤3MA or less (with backlight); ≤1MA or less (without backlight) Quiescent Current: ≤5UA Scope of Application: Motorcycles, cars, small and medium passenger trucks. How e: 1. Unscrew the tire valve. 2. Fix the copper head of the instrument to the valve. 3. The device will display the pressure. 4. You need to find the air pump and the air tube to connect the air nozzle, and hold the handle of the product to inflate it through the inflator when the pressure is low, and vice versa. 5. After the measurement, unscrew the copper head and press the vent button to make the indicator change to 0.