Voistek Call Center Headset with Microphone for Computer USB Connection & VM (H20USB) Direct connect over the head headset,no additional amplifiers or adapters required, most easy setup headset solution for Most Standard Telephones Equipped with Modular RJ Headset Port. Superior call Center quality headset, excellent sound quality, lightweight, durable and comfortable for all day use Noise canceling microphone to reduce background noise and Acoustic Shock Protection circuit to protect your hearing. Flexible goose neck boom,adjustable headband,Extra comfortable leatherette ear pad,hearing on one side and microphone can be worn on either ear. Shirt clips included, NO Mute / Volume Control built in. Not sure about your phone compatibility? See part of compatible phones listed below in Product Description. Cant find your phone models? Just get FREE EXPERT HEADSET HELP OR ADVICE FROM US BY EMAIL.