Extend the life of existing QD headsets and keep agents productive as endpoints change. The Poly DA85 USB to QD adapter bridges a Quick Disconnect headset to USB-based systems, giving IT teams a practical way to standardize connectivity without reissuing headsets across the floor. For organizations that depend on consistent voice performance, this adapter helps preserve familiar headset ergonomics while aligning with modern USB workflows. It is a straightforward fit for contact centers, service desks, and office environments where headset replacement costs add up quickly. Instead of retiring working audio gear, teams can keep it in rotation and reduce unnecessary refresh spend. The DA85 is especially useful when you need a simple path from legacy QD accessories to current UC endpoints. It supports a cleaner migration strategy, minimizes disruption for users, and keeps procurement focused on the accessory layer rather than full headset replacement. For enterprise buyers, that means less waste, fewer compatibility headaches, and a more controlled rollout across mixed-device environments.