Sennheiser 504402 Headset - Wired<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Dual-sided wideband headset for professional communications </span></li><li><span class="a-list-item"> CircleFlex technology provides an instant， custom fit all day long </span></li><li><span class="a-list-item"> ActiveGard protects the wearer from dangerous acoustic shocks </span></li><li><span class="a-list-item"> Noise canceling microphone provides intimate voice quality while removing ambient distraction </span></li><li><span class="a-list-item"> Sennheiser HD voice wideband acoustics reproduce rich， lifelike sound on compatible equipment </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/31m8s5paUhL.jpg" noproxy>