Instructions: Place the nozzle of the gauge over the tire valve. Press firmly to ensure good seal and prevent air escaping. Hold gauge on the valve until the reading on the LCD display locks. Remove the gauge quickly from the valve an read pressure. To retake the reading simply place the nozzle over the tire valve again and repeat. Features: 1. LCD display for easy reading. 2. Super mini size car shaped display. 3. four units: PSI / Kpa / Bar / cm2. 4. Can be attached to key ring. 5. High precision and repetition. Description: 1. Save gas / extend tire life with proper pressure 2. Manual power on / off and power off Specifications: st range: 2-150psi or 0.15-10.0bar or 15-1000kPa or 0.15-10.0 kg / cm2 Display: LCD Power: CR-2025 3 V lithium battery Material: engineering plastic. Powered by: cell lithium battery (included). Color: black Package Included: 1 x digital tire air pressure tester Notes: 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. 2. Please allow slight dimension difference due to different manual measurement.