Keep compatible Poly Savi UC headsets ready for Teams calling with a dedicated DECT dongle tuned for 1,920-1,930 MHz operation. This accessory is designed for organizations that need dependable wireless headset connectivity without adding complexity to the desktop. By using a purpose-built dongle rather than a generic adapter, IT teams can standardize headset deployment and preserve the call quality and range expected from Poly’s UC ecosystem. For shared workspaces, contact centers, and hybrid office rollouts, the D400 helps maintain a consistent user experience across supported systems. It is a practical choice when you need a compact accessory that supports secure, predictable pairing and keeps headset workflows simple for end users. The result is less friction at setup, fewer compatibility questions, and a cleaner path to scaling headset deployments across teams. This model is especially suited to environments where Microsoft Teams is the primary collaboration platform and wireless reliability is part of the user experience standard. It fits the kind of deployment where a lower-cost generic dongle is not enough, and where consistency across the fleet matters more than one-off convenience.