SpeeJector SpeeJector GPS Speedometer with Compass Speedup Test Brake Test Overspeed Alarm 4.3" HD LCD Display for All Vehicle (GPS Model) Black LED  (10 cm)

SpeeJector Digital GPS Speedometer with Compass Speedup Test Brake Test Overspeed Alarm 4.3" HD LCD Display for All Vehicle (GPS Model). This product connects car OBD2 interface by OBD cable, and display the driving datas, e.g. vehicle speed, engine RPM, water temperature, fuel consumption etc. It can keep the driver’s eyes always on road to avoid the dangerous of lowering down head to read the dashboard. This product won’t change any car ECU datas. OBD smart digital device is equipped with a very powerful detection for error code, the device can display the error code information clearly in text form, and it can clear the fault information, and display accelerating competitive mode, brake performance test mode, read the entire vehicle data stream information, and the other functions.