- Mono style headset- Call control unit included- USB-A Stereo Headset- Windows PC and Mac OS compatible- UC Certified- Three Microphone noise canceling on the boom to block out unwanted noise, including breathing- Peakstop hearing protection - block out loud noise spikes in the line- Adjustable flexible boom- BalancedVoice, processes the incoming sound for clearer calls- Speech level normalization, which keeps incoming calls at your preferred volume