Bluetooth A2DP (Advanced Audio Distribution Profile)

Is the Bluetooth A2DP (Advanced Audio Distribution Profile) available on my Inspiron 9100?

Dell Bluetooth configuration lists (audio related)
Audio Gateway
Headset

My Bluetake BT420 headphone manual lists
A2DP (Advanced Audio Distribution Profile)
HSP (Headset Profile)
HFP (Hands-free Profile)
SPP (Serial Port Profile)

When paired I see available services
Headset
Audio Sink

Headset works fine.
What is Audio Sink? It asks for a COM port. Is this what I use to hear stereo audio?