My first bluetooth earbuds were the Sony Ericsson HBH-DS970 back in 2006. Back then batteries were bigger so it had a pendant that hung down, and on that it had a little display on it that would show the names of the paired devices and you could select one. It worked great.

A 3-bit DIP switch would do the job.

A DIP switch, really? Could you imagine the horrendous usability. Plus all that mechanical movement will surely cause early failure. Much better to just have some solder pads. With the cost and performance of USB/battery irons these days surely most users can keep one handy. This completely solves the challenge of accidental pairing and helps the user ensure each device switch is contemplated and intentional.

I assume this is sarcasm. If not, there is much to learn about making consumers happy.

Aside from /s, dial like this looks good. https://www.logitech.com/en-us/products/keyboards/k480-multi...