I've been using a dongle I found on Amazon in 2017 with the description "Plugable USB Bluetooth 4.0 Low Energy Micro Adapter" [1]
Unfortunately, I don't remember if I've installed or adjusted anything on the OS.
One moderately annoying caveat is that I have to open the Settings / Sound panel every time I turn on the headphones, and while the Output Device is always automatically set to the headset, I have to explicitly set the Input Device to the headset as well. When I do I get an alert sound and a quickly cut-off moment (like the "Ca-" of "Call") in the bose-lady voice, as if something went wrong, but then it works correctly.
I imagine this can all be automated somehow, but I haven't had the time to figure out how and it's not _that_ big of a deal to go through the motions.
Unfortunately, I don't remember if I've installed or adjusted anything on the OS.
One moderately annoying caveat is that I have to open the Settings / Sound panel every time I turn on the headphones, and while the Output Device is always automatically set to the headset, I have to explicitly set the Input Device to the headset as well. When I do I get an alert sound and a quickly cut-off moment (like the "Ca-" of "Call") in the bose-lady voice, as if something went wrong, but then it works correctly.
I imagine this can all be automated somehow, but I haven't had the time to figure out how and it's not _that_ big of a deal to go through the motions.
1: https://www.amazon.com/gp/product/B009ZIILLI/