Arestech Head Up Display, Multi-Functions Auto Diagnostic Scanner - Car Code Reader OBD2 EUOBD Display KM/h MPH Speeding Warning, Fuel Consumption, Temperature, Car Error Code and ECU Data HUD FEATURES  Our product connects car OBD2 interface by OBD cable, and display the driving data, e.g. vehicle speed, engine RPM, water temperature, fuel consumption etc. It can keep the drivers eyes always on road to avoid the dangerous of lowering down head to read the dashboard. This product wont change any car ECU data. AUTO DIAGNOSTIC SCANNER - Detection for error code, our product can display the error code information clearly in text form, and it can clear the fault information, and display accelerating competitive mode, brake performance test mode, read the entire vehicle data stream information, and the other functions. DISPLAY RICH CONTENT - 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. TFT COLOR LCD SCREEN - High-definition TFT multi-color screen which can display abundant information. You can easily read them directly whatever Day or Night. No reflection problem like other head up display, all the information can display and read clear. PLUG-AND-PLAY - Automatic adaptation car models, available for cars with OBD II or EUOBD. Please set up your device when you first time use it.