X5 HUD 3 inch Universal Multi Car Head Up Display with OBDII EOBD System, Light Sensors, Rotation Speed, Rotation Speed Unit, Unit Mark, Voltage, Water Temperature, Alarm mark(Black) 1. Automatic adaptation car models, and can apply for cars in line with OBD II or EUOBD (onboard automatic diagnostic system). Plug and Play 2. 3.0 inch screen and high-definition display 3. Multi-color design makes the screen more abundant and easier to read 4. The use of nano-technology to eliminate unwanted reflections and can make display information more sharper 5. Display rich content: speed, engine speed, water temperature, battery voltage, low voltage alarm, high temperature alarm, speed alarm,free switching between kilometer and mile,free switching between Degree C and Degree F 6. Auto power on and off with vehicle started and shutdown, effective protection of the car battery; while retaining the manual switch mode, and more easy to control HUD 7. Automatic and manual brightness adjustment mode, driving without glare 8. Light Sensors: Brightness can be changed with the outside brightness 9. Rotation Speed: Indicates the rotating status of the engine and the scale measured represents the speed reaches 10. Rotation Speed Unit: Indicates the rotating status of the engine 1 meas 1000min 11. Unit Mark: C- degree centigrade, F-Fahrenheit, V - voltage, MPH - Mile per hour, KMH - Kilometer per hour 12. Multi-function display: Voltage, water temperature, speed 13. Alarm Mark: Low voltage alarm, high temperature alarm, speed alarm 14. This product is for driversa?? safety, especially in high-speed driving at night, HUD can keep driver eyes on the road and can decrease car accident. HUD can project the important information (such as speed) onto the windshield, it can help inexperienced novice to control their speed and to avoid speeding violation in the speed limit road. More importantly, it enables the driver instantly read the number in great vision and always make drivers eyes on the road in clear mind.