For use with Yealink SIP-T20(P),SIP-T21(P),SIP-T22P, SIP-T26P, SIP-T28P, SIP-T41P,SIP-T42G PhonesOutput: 5V - 1.2AInput: 100-240V50/60Hz 250mAYealink 5V Power comes in various types. All of which works with T20 T30 T40 series.Brand: Yealink, Model: FBA_YEA-PS5V1200US, Color: Black