EncorePro 500 USB Series - Corded USB Headset | Poly, formerly Plantronics & Polycom
HW535 | Plantronics Encore Pro HW535 USB Over-The-Ear Headset | HeadsetExperts.com
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Plantronics DA40 USB Headset Adapter 71800-41 B&H Photo Video
81961-01 - Plantronics - .Audio 646 Behind-the-Head Stereo Noise Canceling USB Computer Headset - PC Headset - USB Headset - DSP Headset - VoIP Headset - Gaming Headset - Computer Headset - .Audio 645 USB - 76808-01 - 71013-01
Plantronics Voyager 5200-UC Bluetooth Headset | USB Dongle and Charging Case 206110-101 | For Smartphones, PC, MAC, Tablet, Softphones, VoIP, Unified Communications