Features: Model: P10 - OBD Speedometer With Car Diagnostic Tool, Not Compatible For Some Cars (details as pictures in the bottom show).. Plug and play. Real 2.6" TFT LCD multi color smart display. The first scan will show the vehicle protocol. Add new functions: accelerating competitive mode, brake performance test, can read the entire car data stream information. Rich Contents: vehicle speed, engine RPM, water temperature, voltage, instantaneous fuel consumption, average fuel consumption, driving distance measurement, driving time, low voltage alarm, high water temperature alarm, over speed alarm, engine fault code alarm, eliminate the fault code, freely switch between kilometers & miles. Multi function display mode or simple function display mode can be switched freely to show above content. Supporting Protocol: ISO15765 CAN Bus, ISO14230 KWP2000, ISO 9141-2 Specifications: Environment temperature: -40c- + 80c atmospheric pressure 86-106KPa Relative Humidity: 10% -95% enviromental noise