bluetooth usb

Hello all, Hopefully someone can give me some advice. When I present PowerPoint presentations and videos, I have a projector connected directly to my laptop via HDMI. I am looking to purchase a Bluetooth capable soundbar to mount in the classroom approximately 2 meters away. Whilst in this...

Hello: we have a 2013 sony KDL40ex640 hd digital tv. I want to plug headphones to listen that way, and have the builtin speakers silent. 1) the tv has an open usb2 port. can I buy a usb-bluetooth tx dongle and headphones, and that will do the job? or 2) I have an old wireless sennheiser...