Sennheiser 506481 CIRCLE SC 260 USB CTRL II Professional Wired Dual-Sided Headset<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> OPTIMIZED FOR UNIFIED COMMUNICATIONS: Get the most out of your UC solution. All major UC and soft phone brands are supported </span></li><li><span class="a-list-item"> SENNHEISER VOICE CLARITY: Wideband sound for a natural listening experience while a noise-cancelling microphone filters out ambient noise for optimum speech clarity </span></li><li><span class="a-list-item"> IN-LINE CALL CONTROL UNIT: Improve workflow with an ergonomic， simple to use， fingertip controlled， in-line call control unit for seamless call management </span></li><li><span class="a-list-item"> SENNHEISER ACTIVEGARD: Hearing protection technology protects users from acoustic shock and sudden sound surges </span></li><li><span class="a-list-item"> BEST IN CALSS COMFORT: For long-lasting user comfort， CIRCLE headsets features CircleFlex dual-hinge ear cups with acoustic foam ear pads with soft leatherette cover </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41m%2BkKCvl9L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41hQa2BUZjL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/318L2VtXAWL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/413GtyfTDwL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41nsSv8V9aL.jpg" noproxy>