Yealink Wireless Headset Adapter EHS60. Compatible with Yealink Wireless Headset models WH62, WH63. (It is NOT compatible with touchscreen headset versions WH66 or WH67.) The Yealink EHS60 goes with the following specific business telephone brands and models:1. CiscoModels: 6945, 7821, 7841, 7861, 7942G, 7945G, and the 8800 series. (Note: Mute features are exclusively available on Cisco phones).2. Poly (Polycom)Models: VVX series (e.g., VVX 300, 400, 500, 600, etc.) and SoundPoint IP models.3. AvayaModels: 1600 series, 9600 series, and J100 series (e.g., J139, J159, J179).4. GrandstreamModels: GRP series and GXP series (e.g., GXP1600, GXP1700, GXP2100 series).5. Other Compatible BrandsFanvil (X3 series and newer)MitelUnifySangoma (Digium D-Series: D40, D60, D65, D80, D85).Important Requirements:Headset: The EHS60 is only compatible with the standard (non-touchscreen) versions of the Yealink WH62 and WH63 wireless headsets.Choosing the correct and compatible item is the buyer's responsibility!