Audicom Binaural Call Center Headphone Headset with Mic and Quick Disconnect for Yealink SIP-T19P T20P T21P T22P T26P T28P T32G T41P T38G T42G and Huawei ET325 ET525 Telephone IP Phones (301QDGXPC) ONLY PURCHASE IF YOU HAVE ONE OF THE PHONE MODELS LISTED BELOW IN DESCRIPTION, CHECK OUR STORE FOR HEADSETS FOR OTHER PHONE MODELS OR CONTACT US FOR COMPATIBILITY GUIDE! 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. NO Mic Mute / Volume Control built in.