This product is either discontinued or we cannot get that from suppliers.
Yealink SIPWMB-2, Wall Mount Bracket, Designed Yealink SIP T40G, T41S, T41P, T42G, T42S and T43U phone.
The Yealink WMB-T4X is a Wall Mount Bracket that is specifically designed to fit accurately with Yealink T40G, T41S, T41P, T42G, T42S and T43U phone.