Some special models require the original car decoder to support some functions of the original car, such as multi-function steering wheel buttons, door opening and closing information, original car mileage information, original car reversing rear view, original car lights, power amplifier settings, etc. Requires a protocol box for support. In addition to connecting the protocol box hardware on the wire harness, it is not enough. We also need to select the corresponding model in the navigation software to realize the function. The factory default is that the model is not set, so you need to set it according to your vehicle model. Go to settings - factory settings - enter password 1234 - find model selection

1：Settings---Factory---1234Confirm---Car Model

2：CAN Box type---Car Brand---Car Model---CAN Box