Plantronics BT600 USB-A Bluetooth Adapter | Compatible with PC/Mac | 205250-01
DA95 USB QD Cable Adapter Compatible with Plantronics H251 H251N H261 H261N HW291N, HW301N HW710 HW720 and H-Series & HW-Series Headsets - Walmart.com
Amazon.com: USB Adapter Compatible with Any Plantronics or TruVoice Wired Headset with a QD and Includes Volume Control and Mute Functionality (Connects Headset to PC, Laptop and Softphones) : Electronics
RJ9 Plug to USB Headset Adapter Compatible with Plantronics Jabra Sennheiser Wireless DECT Headsets for Use with Computers PC Laptop Mac Tablet Window Softphones Devices : Electronics