Plantronics HW515 USB 203442-01 Corded Headset with USB Connection CLARITY. COMFORT. CONTROL. The EncorePro 500 USB Series is a fully integrated audio solution that enables users to focus on every conversation with all-day comfort, built-in call control, advanced audio processing and an enhanced noise cancelling microphone. The result? An experience that makes every conversation sound natural, enabling the user to focus on what matters most-the conversation.