Yealink UHD-422, UH42 Dual with 3.5 mm jack, no inline control

Yealink UHD-422, UH42 Dual with 3.5 mm jack, no inline control UHM‑421B USB Headset Adapter Module, a variant of the UHM‑421 accessory. It is designed to provide USB connectivity and call control integration for Yealink headsets when used with PCs, laptops, or compatible Yealink IP phones. 📋 Key Details - Category: Headset accessory / USB adapter. - Function: Acts as a USB interface module enabling Yealink headsets to connect seamlessly to UC platforms (Microsoft Teams, Zoom, etc.) and Yealink desk phones. - Features: - Plug‑and‑play USB connection. - Call control buttons (answer, mute, volume). - Optimized for Yealink UH series and WH series wireless headsets. - Use Case: Ideal for enterprise deployments where headsets need to switch between PC softphones and desk phones without compatibility issues.