Features: Four types of unit can be used to display tire pressure measurement, luminous display, LED red light illumination and tread gauge measurement. Comprehensive display contributes to guaranteeing the tire work in normal conditions, to have a safe driving. Dull polish surface with glue spray design, shows fine workmanship and gives you a good hand feeling. Dual power supply for solar and built-in batteries (solar panels in sun/day), batteries can be used in normal for two years (replaceable). In power saving mode, will automatically shutdown for 10 seconds. Can be used in any weather or any environment - day or night (with LED light and LCD backlight function). Support measuring range of 2-150PSI and unit setting of PSI, Kpa, Bar, and Kg/square centimeter. Specification: Item Type: Tire pressure gauge Condition: Brand new Material: Plastic Color: Wine red Measuring Range: 2-150PSI Unit Setting: PSI, Kpa, Bar, Kg/square centimeter Power saving mode, automatic shutdown (10 seconds) Instructions: 1. Test the tire pressure when the tire is cold before driving. 2. Remove the tire's valve and the red light is on. 3. Press the ''on'' button on the tire pressure gauge and the number on the LCD will be 0.0. 4. Continuously press the button for 3 seconds, the number will flash. Press the button to select the unit you are used to (usually Kg/square centimeter ). Each time you press PSI, Kpa, Bar, Kg/square centimeter ---four units switch in order. 1psi=0.0703kg/square centimeter ==0.0689bar=6.89kPa 5. Align the test tip of the tire pressure gauge into the tire valve. 6. Leave for 3-4 seconds and dial out the reading. 7. Press the ''on'' button and release to clear out the previous reading. 8. The tread gauge on the back side can measure the thickness of the tread to keep track of tire wear. Package List: 1 x Tire Pressure Gauge