This product connects to the car's OBD2 interface via an OBD cable and displays driving data, such as vehicle speed, engine RPM, water temperature, fuel consumption, etc. The driver can keep their eyes on the road and avoid looking down to read the dashboard. This product will not change the car's computer data. The intelligent digital OBD device has powerful fault code detection. The device can clearly display fault code information as text, vehicle data stream data, and other functions. It features a smart, multi-color TFT LCD screen. The display mode can be freely switched between multiple functions and a single function display mode. New features include racing acceleration mode, brake performance testing, and the ability to read full vehicle data stream data. The display language can be changed. Comprehensive content: vehicle speed, engine RPM, water temperature, voltage, instantaneous fuel consumption, average fuel consumption, total mileage, driving time, low voltage alarm, high water temperature alarm, overspeed alarm, engine fault code alarm, clears fault codes, freely switches between kilometers and miles. The first scan shows the vehicle protocol. Compatible with cars equipped with OBD2 and EUOBD ports (automatic vehicle diagnostic system), plug and play.