Audicom Wired Telephone RJ Headset with Noise Canceling Mic + Quick Disconnect for Aastra Adtran BT Alcatel Lucent Avaya Gigaset Interquartz Lazerbuilt Ulytel Office IP Phones (H702RQDRJ1AB) Direct connect over-the-head headset, 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. Superior Call Center quality headset, excellent sound quality, lightweight, durable and comfortable for all day use Only works for some specific phones with Standard Modular RJ Headset Port. PURCHASE ONLY IF YOU HAVE ONE OF THE PHONE MODELS LISTED IN DESCRIPTION, CHECK OUR STORE FOR HEADSETS FOR OTHER PHONE MODELS OR CONTACT US FOR COMPATIBILITY GUIDE! NO Mic Mute / Volume Control built in.