Audicom H200GXPA Mono Call Center Headphone Headset with Mic for Avaya 1608 1616 9620 9630 9640 9640G and 9650 and Altigen 805 Cortelco Fanvil C58 C58P C62 C66 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.