Experience crisp audio with the Poly Blackwire 5210 mono headset, featuring a lightweight on‑ear design and dual connectivity via USB‑C or 3.5mm jack. Built for UC platforms like Microsoft Teams, Cisco and Avaya, it includes a single‑button remote, volume control and mute key for effortless call management. The ergonomic headband keeps the unit secure during long sessions while keeping weight under 130 g.