This is how Focals by North [0] work. Everyone I’ve asked about it has thought it’s a silly idea (to have to wear a ring), but I still can’t think of a better interface.
I assure you, the combination of a stand that holds a tablet over my bed and the bluetooth joystick ring is the most comfortable possible bedtime reading scenario.
Amazon is full of them. I got a generic steel gooseneck with a clamp that attaches pretty well to my steel-pipe headboard, and I zip-tie it at a second point. My wife got a floor-standing gooseneck to hold her Chromebook, and added a 20Kg steel weight at the bottom to keep it upright.
