Question about Conceptronic Adapter Bluetooth Bluetooth Adapter 5.1 NanoUSB 10-20m black

I don't think so, better order a BT receiver with a male 3.5mm jack / AUX.

Per se, I would tell you yes. My computer didn't have Bluetooth. With the plug, I was able to expand this. So now I can send connections in & out.

If then it's the operating system of the Boses speaker that would refuse it.

Just give it a try.
Otherwise you can always return it😉.