Expand The Connectivity Options Of Your Current Plantronics® H-Series Headsets With This Usb Adapter. With This Corded Usb-To-Headset Adapter And H-Series Headset (Traditionally Used With A Desk Phone), You Can Now Manage Your Pc Communications With Superior Call Clarity And The Simplicity Of Inline Call Controls. Connecting Types: Usb. For Use With: Plantronics® H-Series Headsets. Accessory Type: Audio Processor..