Audicom Corded Call Center Phone Headset Headphones with Quick Disconnect for Polycom SoundPoint IP Phone Series 550 600 601 650 300 301 430 500 Lazerbuilt Orchid Ip Telephone Ear Phone (301QDRJ1F) Superior quality sound with the flexible adjustable noise cancellation microphone. Direct connect over-the-head headset headphone, No additional amplifiers or adapters required. NO Mute / Volume Control built in. Comfortable ear and mic cushions, Most easy setup headset solution, Super Durable,Super Lightweight 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!