[Daneel_]

The power generation portion of that switch is around 1.4x1.4cm and can power the transmitter to send a signal over 40m. I think it’s likely that it could be adapted into a ring form.

See: https://core-electronics.com.au/attachments/uploads/TEL0173-...

[margalabargala]

1.4x1.4cm is gigantic for a ring that is currently just a band. And to say nothing of the depth required.

Even if you shrink it 50% the ring would be mostly power generation button.