Multifunctional LCD HUD display for vehicles showing speed1、Purpose: You can drive without bowing your head, and pay attention to the dynamics of the vehicle at any time, greatly guarantees driving safety. 2、LCD Color Display: The resolution is higher, and the brightness of the screen is adjusted by the light sensed by the light source sensor. 3、Multi Function: OBD vehicle speed, rotation speed, clear fault code, water temperature, voltage, vehicle roll angle, vehicle depression angle and other functions. 4、Wide Application: Extensively suitable for Chinese cars, Asian cars, American cars, European cars and some small trucks. 5、Units Switching: Free switching of water tank temperature in Fahrenheit and Celsius, free switching of vehicle speed in English and metric units. 6、High Performance: Support 9 major OBD protocols. Fully automatic monitoring of vehicle driving conditions. Clearing automobile fault codes function. High sensitivity free rotation.