Hi Carie,
Setting up Bluetooth is best done via the web UI (are you familiar with the web UI?) - click the COG wheel >> click on Bluetooth >> click on Scan Bluetooth >> click on your speakers name >> click on 'pair'.
If the two devices will not pair, try clearing the memory on the Bluetooth speaker - this is delete all previous pairings - and then try the above again.
Volume control is done on the speaker not the B2.
Paul
Brennan Support.