Yealink PSU-5V-0.60A Power AdapterPower Adapter for Yealink T19E2, T19PE2, T21E2, T21PE2, T23G, T23P, T30, T30P, T31, T31G, T31P, T33G, T33P, T40G, T40P, W52P, W56P, W60B, W52H, W53H, W56H as well as for Yealink W59RThis is NOT required if you use a PoE Switch for PoE Enabled Phones
