Keep one ear available for nearby conversation while maintaining a wired USB connection for PC calls, virtual meetings, and contact-center conversations. The Poly Blackwire 3210 uses a monaural on-ear design with a boom microphone and USB-C host connection. Its included USB-C to USB-A adapter supports connection to computers equipped with either common USB port type, without changing the headset. Inline controls put core call functions within reach on the headset cable. Users can answer or end calls, adjust listening volume, and mute the microphone without reaching for application controls. The noise-canceling microphone is intended to focus voice pickup during calls in shared office, home office, and support-desk environments. A wired connection also removes the charging cycle associated with wireless headsets. HPP-8X214AA fits deployments that need a single-ear USB headset rather than a stereo listening device. The monaural configuration leaves the second ear open for local communication, announcements, or situational awareness. It is suited to individual workstation assignments where the user moves between USB-C and USB-A computers, including laptop docking areas, reception desks, service counters, and hybrid-work spaces. Select this configuration when a corded Poly Blackwire 3210 headset with the bundled USB-C/A adapter is required.