Getting my Rii Bluetooth remote to work

I have a fairly old Rii (or generic copy?) bluetooth remote (on the back, the model is RT-MWK02).

I somewhat naively expected it might just work when I plugged it in, but it doesn’t. I’ve looked around in the GUI and not found anything related to Bluetooth so I know the next step involves the terminal.

I’m not especially experienced in terms of terminals and whatnot, so I will probably need a bit of handholding here, and don’t really have any idea where to start.

Any help appreciated!