Audicom Wired Call Center Headset Headphone with Mic + Quick Disconnect for Telephone Aastra 6757i Avaya 1416 2420 5410 Mitel 5330 NEC Aspire DT300 DSX ShoreTel IP230 Polycom IP Phones(H700RQDRJ1A) 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.