Description: <p> SC 30 USB CTRL is a deployment-friendly， single-sided wideband headset compatible with global providers of Unified Communications solutions. Features include noise-canceling microphone and large ear pad for comfortable use. SC 30 USB CTRL is designed for users who require maximum call-handling flexibility when working in Unified Communications environments. </p><p>Features: </p><p> <ul><li> Compatible with global providers of Unified Communications solutions ??" with integrated call control and USB connector<li> Sennheiser HD voice clarity ??" wideband sound for a natural listening experience<li> Noise canceling microphone ??" filters out ambient noise for optimum speech clarity<li> High-comfort ??" large ear pad in a lightweight headset for relaxed wearing<li> Single-sided wearing style ??" let??TMs you hear what??TMs going on around you<li> Solid construction ??" crafted with look and feel in mind<li> Bendable boom arm ??" ensures microphone position is always optimal. Cannot be twisted out of position<li> Pivotable boom ??" rotates through 340 degrees for wearing flexibility on right or left ear and precision microphone placement<li> ActiveGard ??" technology protects you from acoustic shock and sudden sound surges<li> Call control features: answer/end a call， volume up/down， microphone mute， redial last outgoing call and reject incoming call</ul> </p> <br>