Plantronics Blackwire C3210 USB Type A Corded UC Headset Over Head 209744-101 17229160163 | eBay
Poly - Blackwire 3210 - Wired, Single Ear (Monaural) Headset (Plantronics) with Boom Mic - USB-A to connect to your PC and/or Mac - Walmart.com
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Plantronics BlackWire C3210 USB-A Headset - Black (209744-104)