Support focused, full-shift calling with a binaural headset that places audio at both ears and uses a voice-tube microphone for speech pickup. The Poly EncorePro 520V is a corded headset format for agents and desk users who need a dedicated audio endpoint rather than a Bluetooth headset or speakerphone. Its two-ear wearing style helps reduce attention pulled from nearby conversations in active support and service environments. A Quick Disconnect connection separates the headset from the endpoint connection path. This allows the headset to connect through a compatible Poly Quick Disconnect cable or adapter selected for the desk phone, softphone adapter, or audio processor in use. The connection type also provides a practical release point at the desk without handling the headset cable at the endpoint each time. HPP-783P8AA#ABA specifies the voice-tube version of the EncorePro 520V in a binaural configuration. That combination matters when selecting among headset variants: this unit uses two earpieces instead of a single-ear design and a voice tube instead of a conventional boom microphone. Match the Quick Disconnect interface to the existing Poly connection hardware and endpoint before deployment.