New Universal 5.5" Speed Head Up Display KMh / MPh Speedometer with OverSpeed Warning, Car OBDII Interface HUD Fuel icon Head-Up LCD Display,Vehicle/Engine Speed,Water Temperature #1. 5.5" large screen and high-definition display with multi-color design and nano-technology to eliminate unwanted reflections makes the screen more abundant clearer, sharper and easier to read. #2. Automatic adaptation car models, apply for cars in line with OBD II or EUOBD (onboard automatic diagnostic system). Plug and Play, Easy and Convenience. #3. New function: driving mileage measurement. Dual adjustment mode: Automatic and manual brightness adjustment, provide zero glare when driving. #4. Auto power on and off with vehicle started and shutdown, effective protection of the car battery; while retaining the manual switch mode, and more beneficial to control HUD. #5. Variety Display: Speed, Engine Speed, Water Temperature, Battery Voltage, Instantaneous Fuel Consumption, Average Fuel Consumption, Mileage Measurement, Shift Reminding, Fatigue Driving Reminding, Low Voltage Alarm, High Temperature Alarm,Speed Alarm, Engine Fault Alarm, Fault Code Elimination, Free Switching between Kilometer and Mile.