Sennheiser Business headset SC 260 MS II, USB, black Wearing flexibility Wear it on the left or right due to the pivotable boom that rotates 350° for precise microphone placement. Optimal speech transmission Bendable Boom arm ensures optimal microphone position. Optimum speech clarity Noise canceling microphone. Personal fit Numbered headband grooves for step-by-step adjustment. Built to last Its durable construction with a lightweight metal reinforced headband is designed for years of continous use.