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Amazon.com: Poly - EncorePro 530 Quick Disconnect (QD) Headset (Plantronics) - Works with Poly Call Center Digital Adapters (Sold Separately) - Acoustic Hearing Protection - Over-the-Ear Wearing Style : Electronics
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MDA500 QD Series - Corded Switcher/Mixer for Quick Disconnect (QD) Headsets | Poly, formerly Plantronics & Polycom
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Plantronics Blackwire 3215 Mono USB-C QD Headset with 3.5mm Connector| Certified for Skype for Business and Optimized for Microsoft Lync | Built for UC applications and softphones from Avaya, Cisco and others
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