Three hidden settings were found in this car radio:
1)On the Preset button - equalizer settings.
2)On the Menu button - region settings.
3)On the Auto button - deeper system settings, which I could not understand. If you have any manuals, write in the comments.
All settings are activated when you simultaneously turn on the car radio and press the above buttons.
![](https://i.ytimg.com/vi/zxlsWGeFB78/maxresdefault.jpg)