for Polycom Power Supply is Compatible with VOIP Polycom VVX Models 101, 201, 300, 301, 310, 311, 400, 401, 410, 411, 500, 501, 511, 550, 600, 601, 611, 1500,CCX 500, 600, 700.

Amazon.com: Professional Phone Call Bluetooth Headset for Poly Polycom vvx 600, 601, Edge E220, E320, E350, E450, E550 Any Bluetooth Featured Phone+USB-A Dongle for Teams, Zoom and More PC Phones(Mono Speaker) : Electronics

48v Power Supply, 48v Power Adapter is Compatible with polycom IP Phones VVX 300, 301, 310, 311, 400, 401, 410, 411, 500, 501, 511, 600, 601, 611, Sound Point IP 560, 670...