Amazon.com: TruVoice USB-A to QD Adapter Cable Compatible with Any Plantronics Wired Headset with a QD and Includes Volume Control and Mute Functionality (Connects Headset to PC, Laptop and Softphones) : Electronics
VoiceJoy QD to USB Adapter Similar DA70 DA80 Headset Quick Disconnect to USB Cable for Plantronics Headsets|Earphone Accessories| - AliExpress
BT300 - Bluetooth USB Adapter | Poly, formerly Plantronics & Polycom
Genuine AC Adapter For Plantronics W740 W430 W8210 W8220 Headset Charger OEM | eBay
Plantronics QD Cord to Analog (PC) 3.5mm Jack Adapter | Headsets.com