Main Features - Supports Yealink T58A/T57W/T54W/T53W/T53/T48S/T46S/T42S/T41S IP Phones - Compatible with Jabra, Plantronics, Sennheiser wireless headsets - Plug and play - Answer incoming call through remote wireless headset - Terminate calls using remote wireless headset key - Incoming calls are signalled in the headset earpiece Physical Features - 1 x USB 2 .0 connector - 1 x RJ45 (8P8C)/1 x RJ9 (4P4C) output port for GN/Jabra/SennheiserPlantronics headset - Accessories: - 1 x Jabra Y- Cord - 1 x Plantronics Y-Cord - 1 x Sennheiser Y-Cord