This is the Plantronics USB-A (regular) to USB-C Adapter.  Converts regular Plantronics USB (-A) headsets to a USB-C headset. This adapter is both PC and Mac compatible for all Plantronics Blackwire, Savi, Calisto or Voyager UC Headsets  

Key Features:

* Compatible with All Plantronics USB headsets (wired) or wireless USB Headsets