I bought a cheap ring turner. It has 3 buttons and is paired as ZL03 keyboard. I can set up long presses but that's not ideal. I did find that with Performance Mode active, the middle button works with one click to change pages, which is what I wanted. Unfortunately, the other buttons do long swipes which, although fine on a 2 page piece (the majority of multi page music I have), on a longer piece (or hymn book, for example) it changes multiple pages, which is useless (it's sensing a fast swipe up).
So it works adequately in Performance Mode but otherwise brings up the annotation menu (which I like having active with Stylus sensed so can't uncheck that).
Using Samsung S7+
So it works adequately in Performance Mode but otherwise brings up the annotation menu (which I like having active with Stylus sensed so can't uncheck that).
Using Samsung S7+