Jabra BIZ 2400 II QD Duo UNC headset. Cushioning around the headband and ear pieces, plus a lightweight construction, enable the headset to rest easily on your head. Both you and your callers will enjoy the headsets cutting-edge audio, featuring ultra noise cancellation to dramatically reduce background distractions and ensure only your voice is heard. The microphone also includes a freely rotating, 360-degree boom arm, and is aerodynamically designed to reduce popping from air shocks.