(Pictured: Jabra BT 620s)

Advanced Audio Distribution Profile, or A2DP for short, is just one of the many standardized applications of Bluetooth. Without sounding too technical, A2DP basically allows stereo sound to be transferred to a headset or car radio...without wires. Just pair an A2DP-capable headset with an A2DP-capable smartphone or PDA, and you can listen to Tutti Frutti Summer Love even if you're phone's in the pocket, or across the room. Plus, many headsets automatically pause the music when a call comes in. Yeahhhhh!!!!