ITEM NAME:Digital tire air inflator pressure gauge 200 psi car motorcycle bike Tru P6M5 Specifications Measurement range: 3-200 PSI Display mode: digital display Functional features: Retainable readings, high measurement accuracy and durability, switchable PSI, MPa, Bar, Kg/cm2 and other four units Material: All Metal Subject Built-in battery: 2xCR2032 Applicable models: general purpose Working temperature: - 20 - 80 C Operation steps: 1. Measure the tire pressure when the tire is cooled. 2. Tighten the tire valve nozzle with the tail end of the tyre pressure gauge, that is to say, the highest value can be displayed digitally. 3. Keep the tire pressure gauge in the front vertical direction and read the tire pressure. 4. Please check the tire pressure value (refer to the automobile's instructions) and maintain the correct tire pressure. 5. After reading, press the relief valve to remove the pressure in the pressure gauge. 6. After measurement, the cover on the tire valve nozzle is locked again. Packaging contents: 1 x tire pressure gauge.Tighten the tire valve nozzle with the tail end of the tyre pressure gauge, that is to say, the highest value can be displayed digitally. Keep the tire pressure gauge in the front vertical direction and read the tire pressure.