Introduction: This product is for drivers safety, especially in high-speed driving atnight, HUD can keep driver eyes on the road and can decrease caraccident. 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. Moreimportantly, it enables the driver instantly read the number in greatvision and always make drivers eyes on the road in clear mind. This HUD can display many useful information, and allows you to experiencethe speed and also to ensure your driving safety and driving pleasure.And it adopts the latest stable integrated circuits, all indexes are inline 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 orEUOBD (onboard automatic diagnostic system).Plug and Play.3 inch screen and high-definition displayMulti-color design makes the screen more abundant and easier to readThe use of nano-technology to eliminate unwanted reflections and can make display information more sharper.Display rich content: speed, engine speed, water temperature, batteryvoltage, low voltage alarm, high temperature alarm, speed alarm, freeswitching between kilometer and mile, free switching between Celsius and Fahrenheit.Auto power on and off with vehicle started and shutdown, effectiveprotection 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 0CBarometric press:86-106KPaRelative humidity:10%-95%Environment voice:=60dBAlarm of sound level: