Polycom Compatible Plantronics VoIP Noise Canceling EncorePRO HW530 Headset Bundle | SoundPoint&reg; Phones: IP 450, IP 501, IP 550, IP 560, IP 601, IP 650, IP 670, VVX300, VVX310, VVX400, VVX410, VVX500, VVX600, VVX1500, CX300, CX600 Bundle of 2 items - Plantronics EncorePRO Headset & Polycom Telephone Interface Cable Quick Disconnect - Allows for easy disconnect from phone without removing headset Compatible Polycom IP Phones: IP 450, IP 501, IP 550, IP 560, IP 601, IP 650, IP 670, VVX300, VVX310, VVX400, VVX410, VVX500, VVX600, VVX1500, CX300, CX600 Low-cost, affordable, commercial-grade headset - works with Polycom office phones with a headset port (RJ-9/RJ-22) Plug-n-Play ease of use, Premium Plantronics Wideband Audio