Headphone Jack RJ9, RJ11. Work with Grandstream, Yealink, Avaya, Snom, etc. Headphone jack RJ9, RJ11. 【COMPATIBLE LIST FOR YEALINK IP PHONES】: RJ9 connectivity to Yealink IP phones, including SIP-T19P T20P, T21P, T22P, T26P, T27P T28P, T23G T27G T29G T32G, T33G T38G, T40P, T40G, T41P, T41G, T41S, T42S, T42G, T46G, T48G, T48S, T49G T53W T54W T56A T57W T58A etc.
This product would be ideal for professionals who require a high-quality, professional-grade phone headset for their standard telephone communications.
