Using Bluetooth button pads with Mira

I saw somewhere that we could use the a bluetooth button pad for controlling Mira. How do we get Mira to recognise them? Are there specific button pads that work well? This would be very helpful in noisy and turbulent conditions, and would hopefully mean we could have Mira working in the background in such conditions whilst we used Garmin/Foreflight in the foreground

Some examples that will work. Once you pair it with your device, it should just work.