Evolve 80 Stereo (Binaural) USB and 3.5mm UC Headset. USB adapter with 3.5 mm jack integrated into the control unit allows you to easily connect your headset to your PC, Smartphone, or Tablet. Active Noise Cancellation (ANC) Technology can be turned on or off to reduce unwanted background noise. Integrated busy light to let others know when you are connected to an active call. Microphone boom arm can be hidden into the headband when not on a call, or listening to music. Microphone mute button on boom arm. Listen-in feature. Soft Pouch Included.