Music sounded pretty good, though not as rich or as warm as it did over other headphones I tested. Phone calls sounded fine, and I was particularly impressed with how the BackBeat handled background noise. Music will automatically pause allowing you to answer the call by pressing the control button (the skinny button next to the play/pause button) on the Right side. The S-2’s can actually be paired with as many as 6 devices. When the Bluetooth stereo headset invokes the AVRCP Pause command, the Bluetooth music play can start streaming silence so that to the end user music appears to have been paused. This option is shown in Figure 5.