Plantronics PLNAUDIO478 Stereo USB Headset fOR PC Noise cancelling headset with HD sound makes it a pleasure to stay on the call; cancel noise, not your voice Digital Signal Processing technology cancels out echoes and boosts voice signals for clear conversations Headset is Skype certified for a better chatting experience *In order to use the inline call answer/end and mute functions of our Audio USB headsets with Skype, users must download and install the Plantronics Hub application Even with Hub installed, inline call answer/end and mute will not work with Microsoft Lync or Skype for Business applications. For compatibility with these enterprise applications, users need to purchase commercial headsets, like our Blackwire series Answer and end Skype calls right from the headset with our answer/end and mute functions *requires the latest versions of Windows 10, Mac OS and Skype - we cannot guarantee compatibility with all versions of Skype and PC operating systems