yealink yhs34 mono analog wired headset - qd to rj9

Plug-and-play - RJ9 connectivity to Yealink IP phones, including T19(P) E2/T21(P) E2/T23P/ T23G/T27G/T29G/T30/T30P/T31/T31P/T31G/T33P/T33G/T40P/T40G/T41S/ T42S/T46S/T48S/T42U/T43U/T46U/T48U/T53/T53W/T54W/T57W/T58A/ VP59/T41S SFB/T42S SFB/T46S SFB/T48S SFB/T55A SFB/T56A SFB/T58A SFB/MP56 HD Voice/Wideband speaker performance Noise-canceling microphone and passive noise cancellation ActiveProtection technology safeguards users from acoustic injury 330 bendable boom arm for easy adjustment without breaking Leatherette Ear Cushion - QD to RJ9 cord included for specific Yealink model telephones