Plantronics .Audio 355 Multimedia Headset 40mm stereo speakers deliver rich, resonant stereo with maximum bass response. Don't just hear it--feel it. Lightweight and flexible, the headset is comfortable for hours. Pillow-soft, swivel-mounted ear cushions focus stereo sound for maximum enjoyment. The QuickAdjust microphone telescopes and rotates for precise placement. When not in use, it rotates discreetly out of the way. The noise-canceling microphone reduces background noise so you can easily be heard.