Audicom Wired Call Center Headset Headphones + Quick Disconnect for AVAYA Lucent 6402D 6408D+ 6416D+M 6424D+M 8403 8410D 8434DX 4406D+ 4412D+ 4424D+ 4424LD+ 2410 2420 4620 4621 Ip Phone Telephone 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 PURCHASE IF YOU HAVE ONE OF THE PHONE MODELS LISTED BELOW, CHECK OUR STORE FOR HEADSETS FOR OTHER PHONE MODELS OR CONTACT US FOR COMPATIBILITY GUIDE! NO Mic Mute / Volume Control built in.