Audicom H201GXPC Binaural Call Center Headphone Headset with Mic for Yealink SIP-T19P T20P T21P T22P T26P T28P T32G T41P T38G T42G T46G T48G and Huawei ET325 ET525 Telephone IP Phones ONLY WORKS FOR SOME SPECIFIC PHONES. SEE COMPATIBLE PHONE LIST IN DESCRIPTION, BUY THE ITEM TODAY IF YOU HAVE ONE OF THE PHONE MODELS LISTED BELOW. Direct connect over-the-head headset headphone, No additional amplifiers or adapters required, Most easy setup headset solution. Noise canceling microphone to reduce background noise and Acoustic Shock Protection circuit to protect your hearing. Super Lightweight, Super Durable Headset with Comfortable ear and mic cushions, Shirt clip included. NO Mic Mute / Volume Control built in.