Visit Amazon sites : br Sennheiser Culture Series Wideband Headset (SC30-USB-CTRL)br br Sennheiser HD voice clarity - wideband sound for a natural listening experience br Noise canceling microphone - filters out ambient noise for optimum speech clarity br High-comfort - Single sided large ear pad in a lightweight headset for relaxed wearing br Call control features answerend a call volume updown microphone mute redial last outgoing call and reject incoming call br Bendable boom arm - ensures microphone position is always optimal Cannot be twisted out of position br Pivotable boom - rotates through 340 degrees for wearing flexibility on right or left ear and precision microphone placement