Amazon.com: 504P USB Adapter for Plantronics and Addasound Headsets - by Global Teck Worldwide - Connects to Headset to PC, MAC, Lync, Skype & USB VoiP Phones - Mute, Volume and Quick
Plantronics - Office Machine Supplies & Accessories; Office Machine/Equipment Accessory Type: Headphones ; For Use With: PC Via USB/USB-C; Connects To Mobile Devices & Tablets Via 3.5 mm & Devices That Support