Single-sided wideband headset compatible with global providers of Unified Communications solutions with integrated call control and USB connector. Noise canceling microphone filters out ambient noise for optimum speech clarity.Large ear pad in a lighweight headset for relaxed wearing. Bendable boom arm ensures microphone position is always optimal. Pivotable boom rotates through 340 degrees for wearing flexibility on right or left ear. ActiveGard 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 and reject incoming call. 2 year warranty.