Key Features and Benefits > WF50 (V1): compatible with Yealink SIP-T42U/T43U/T46U/T48U (108.86.0.70 or later), Yealink SIP-T53 (96.86.0.70 or later) and Teams MP54 > Dual-Band Connectivity > High Transmission Rate > Interference Free > Reliable Connection > Easy to Use > Plug and Play