Quad-Layer Speaker Technology, HD voice capability, and a MEMS microphone provide an extraordinary sonic experience with crystal-clear voice interactions. Call and play/pause controls now located on the top of the headset, these chrome buttons are stylish and functional, providing quick and intuitive control of primary headset functions. Jog buttons are simple. Fluid volume and music controls replace traditional volume up/down and fast forward/rewind buttons. Increased talk time up to 16 hours and music play time up to 11 hours. Lightweight, Around-the-Neck Design.