Single-sided wideband headset optimized for Microsoft Lync with integrated call control and USB connector. Noise canceling microphone makes speech transmission crystal-clear and suppresses cambient noise in offices. Large ear pad in a ultra lightweight headset for relaxed wearing. Bendable boom arm ensures microphone position is always optimal. Active Gard technology protects you from acoustic shock and sudden sound surges. Call control features: Answer/End a call, volume up/down, microphone mute & redial last outgoing call. 2 year warranty.