5 6 inch Car HUD Head Up Display OBDII Interface Feature: 1. Detecting car’s OBDII interface automatically & all car with OBD II or EUOBD are OK, plug & play; 2. Car speed, engine speed, water temperature, voltage/ throttle position/ Ignition angle/ one-hundred-kilometer acceleration time, instant fuel consumption, average fuel consumption, mileage, fuel shortage reminding, engine faulty, shift reminding, etc. are displayed; 3. Normal display mode, high-speed display mode & automatic display mode are set by yourself; 4. Kilometers & miles are free to switch, which greatly facilitates the dashboard of British Standard; 5. 6 inches display area, easy to read; 6. Switch on & off automatically, HUD start when car starting HUD shutdown when the engine is turning off to protect the car battery effectively; at the same time, you can switch on & off HUD by Manually Shutdown to protect the battery safety; 7. Single-stage & four-stage overspeed alarm for driving safely; 8. Engine speed alarming so that you can shift timely to save fuel, also has a special significance for the novice; 9. Automatic & manual brightness adjustment mode, no dazzling; 10. Compass (this function is optional) the precise position, car does not get lost; Accurately determining the position & not get lost. Installation Instruction: 1. Make sure if your car complies with OBD II (or EU OBD) interface standard; 2. Open up the engine hood & look for the OBDII sticker. If there is a s