[Speedometer display] Car hud HD display screen, multiple display screens can be switched, interface digital colour can be freely adjusted, 9 display colours, you can switch to your favourite colour and interface, full sense of technology, sensing the external light intensity, automatically adjust the brightness to adapt to the environment. Avoid the driver in the driving process to look down at the instrument to affect the , this product does not rewrite any data in the ECU. [OBD function] Speed, water temperature, voltage, fuel consumption, RPM, single mileage, total mileage, driving time, driving direction, number of search stars, altitude, time, intake pressure, oil temperature, air-fuel ratio, turbo pressure, intake pressure, acceleration test, brake test, clear fault codes, read data streams, overspeed alarms, RPM alarms, water temperature alarms, voltage alarms (OBD is only reading your car's data, if your car's data is not read, it will not be changed). [GPS function]Speed, voltage, satellite time, altitude, number of satellites, driving direction, single mileage, driving time, acceleration test, brake test, speeding alarm, low voltage alarm. [Plug and Play]Heads up display for cars, Simple and easy to install, plug and play, just use our 360 rotating bracket to mount the GPS meter on the dashboard or windscreen. [Compatibility Issues]car hud display OBD II is only available for vehicles manufactured after 2008.GPS mode is available for all vehicles (If your car is not compatible with OBD mode, please select GPS mode.) OBD ll is not compatible with electric cars, cars, pickup trucks, RVs and meter-converted cars, so GPS mode is recommended. Colour:Black Material:Plastic Package Contents: 1x Car Heads Up Display Set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.