Amazon.com: Plantronics EncorePro HW520D Digital Series Headset : Electronics
Plantronics Encore Pro HW520 Corded Duo Headset | Nortel, Polycom, Cisco, Mitel, Avaya, ShoreTel and other business phones | Requires Adapter | 89434-01
Poly EncorePro HW525 USB Binaural On-Ear Headset 203444-01 B&H
Amazon.com: Poly - EncorePro 515-M USB-A and USB-C USB Headset (Plantronics) - Optimized for Teams - Hold & Call Answer Buttons - Works with Avaya, Genesys, & Cisco Call Center Platforms - Single
Amazon.com: Plantronics EncorePro HW525 USB Binaural On-Ear Headset : Electronics
Plantronics EncorePro HW725 USB Dual Ear Professional Headset