Boom mic lets you chat with your friends & family on Skype and on multiplayer network games Circumaural design provides optimum comfort and noise isolation Sit comfortably anywhere in your room as the CS510-XD offers wireless range of up to 350 ft Great for Audio/Visual Labs, Assisted Listening Systems and more that have a Mono jack for non-stereo use Designed to address wireless density issues. More wireless headsets can be used in the same space, while maintaining clear conversations. Uses 900 MHz technology to provide up to 350' of range. Includes a convertible headset with a hot swappable battery for unlimited talk time.