Poly Blackwire 3210 USB Type-A Corded Monaural UC 209744-101 B&H
Plantronics Blackwire C3220 Binaural Stereo Computer Headset - Wired, USB-A, Noise-Canceling, Volume Control - Mac and Windows Compatible - Colour: Black 209745-101 - Hunt Office Ireland
Amazon.com: Plantronics - Blackwire 5210 - Wired, Single Ear (Monaural) Headset with Boom Mic - Computer Headset - USB-A, 3.5 mm to connect to your PC, Mac, Tablet and/or Cell Phone : Everything Else