If you use a Snappic to control the backlight of the booth, then you need to press “Select accessories”, then to choose the MixUp booth.
In case if you want to use the booth with some other software that's not integrated with our booth yet, then you can use BLE Terminal app.
You can find it for iOS and Android devices.
That's the one that I use.
To adjust the brightness of the booth, simply press the button.