BEYERDYNAMIC APP
For complete control over the Aventho 300 you should use their smart app.
The app currently supports the 4 wireless models available by beyerdynamic.
You should first press the power on button for 6 seconds to initiate the Bluetooth pairing mode and then start the app.
As you can all see the app checks for new firmware updates and informs you of it (your device needs to be charged at least 50%).
Everything is included in the main tab so from here you can access the equalizer function (5 modes), ANC (2 modes, 5 levels), Dolby Atmos (spatial sound / head tracking), wearing detection, touch pad guide, auto shutdown, voice prompts (English & German), sidetone and LED brightness.
Worth pointing out is that there's a subtle playback effect at the base of the app when using the Aventho 300 as seen above.
Finally, you can do a factory reset from inside the settings tab.