MiTV 4K Enable Debug Mode

MiTV 4K Enable Debug Mode

Settings > About > Build version, click 7 times.
Note: The build version normally is the last info.

{ } Developer option will appear.

{ } Developer option > [x] Developer option 啓用開發者選項 [x] USB debugging USB 調試

A dialog box appear, allow the permission.

Now you can use the ADB:
$ adb connect

The ip address can be found on the network info.