WiiYii M21 Popular HUD Windshield OBD GPS M21 Auto Electronics RPM Alarm Plug and Play Head up Displays for All Cars
Item No.: M21
OBD2 mode functions: Speed, RPM, Voltage, Water temeperature, Fuel consumption, Compass, Travel time, Driving distance, Number of satellite , Altitude, Clock, Acceleration time, Auto-sensitivity, Voltage alarm, Water temperature Alarm, Over speed alarm, R
