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Amazon.com: Poly - Blackwire 5220 USB-A Headset (Plantronics) - Wired, Dual Ear (Stereo) Computer Headset with Boom Mic - USB-A, 3.5 mm to connect to your PC, Mac, Tablet and/or Cell Phone :
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Plantronics Encore Pro HW520 Corded Duo Headset | Nortel, Polycom, Cisco, Mitel, Avaya, ShoreTel and other business phones | Requires Adapter | 89434-01
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