Sennheiser 504408 Headset - Wired Black<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Optimized for Microsoft Lync - with integrated call control and USB connector </span></li><li><span class="a-list-item"> Best-in-class comfort - CircleFlex patent-pending dual-hinge ear cup system that adapts seamlessly to your ears， for instant perfect fit and relaxed all-day wearing </span></li><li><span class="a-list-item"> Noise-canceling microphone - filters out ambient noise for optimum speech clarity </span></li><li><span class="a-list-item"> Unique robust construction - crafted with look and feel in mind </span></li><li><span class="a-list-item"> Dual-sided wearing style - numbered headband grooves for step-by-step adjustment ensures perfect stereo sound reproduction in noisy environments </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41a6YzmoSFL.jpg" noproxy>