The ES-100 EchoStop microphone provides for headset free, speakerphone type operation on any multimedia PC, for small group desktop VoIP audio conferencing. The ES-100 utilizes Andrea Electronics’ patented EchoStop echo cancellation algorithm and our PureAudio noise reduction digital technology to ensure clear audio performance with no residual acoustic echo or speaker feedback. PureAudio provides active noise cancellation on the microphone signal to reduce the drone of background noises such as air-conditioning, fluorescent lighting and video projectors etc.