Plantronics Blackwire C3220 USB Headset : Electronics - Amazon.com
Amazon.com: Plantronics - Blackwire 3210 - Wired, Single Ear (Monaural) Headset with Boom Mic - USB-A to connect to your PC and/or Mac : Everything Else
lot of 2 Plantronics Blackwire C3220 USB-C Stereo Computer Headset | eBay