I need a recommendation for Bluetooth

I have BT headphones that I want to use to watch movies while my wife is watching Korean videos on her PC. Headphones are by Manhattan.
I used to have a USB dongle whose name escapes me but it is now lost.
So, I am looking for advice on which one to buy.
The lost one also had wifi in it but I don’t need that if that makes any difference.

Audio Profile for Bluetooth is currently not supported on OSMC. So you may want to hold back with your idea first.

Continuing the discussion from Bluetooth speaker connection failed: