Introduction:This product is for drivers 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. This HUD can display many useful information, and allows you to experience the speed and also to ensure your driving safety and driving pleasure. And it adopts the latest stable integrated circuits, all indexes are in line with the standards. And our HUD has unique and elegant shape, smooth lines, thin body. Features: Automatic adaptation car models, and can apply for cars in line with OBD II or EUOBD (onboard automatic diagnostic system).Plug and Play. 3 inch screen and high-definition display Multi-color design makes the screen more abundant and easier to read The use of nano-technology to eliminate unwanted reflections and can make display information more sharper. 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 Celsius and Fahrenheit. 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. Automatic and manual brightness adjustment mode, driving without glare. Specification: Environment temperature - 40 0C---+80 0C Barometric press:86-106KPa Relative humidity:10%-95% Environment voice:=60dB Alarm of sound level: