Universal F4 Head Up Display HUD ODB2 Auto Car Speedometer Warning System Saf-lk
HUD Main Functions&Features HUD size: 150 85 14(mm). When HUD connected cars, pls donnot to start the engine, shift to ‘ON’, wait for the off of HUD.Long push right for 5s,HUD will give a beep sound, then HUD finished clear the fault code.