Automatically adapts to car in line with OBD II or EUOBD plug. Plug and play. Multi-color design makes the screen more abundant and easier to read. Nano-technology to eliminate double reflections.Automatic and manual brightness adjustment mode,driving without glare. Rich Contents: speed, compass, single driving time and distance, local time, satellite number, altitude, speed alarm, free switch between Km and miles. Auto power on/off: HUD starts and turns off with vehicle gets started and shutdown, effective protection of the car battery..syi