Andrea Communications C1-1024400-1 Model ANC-750 Stereo Analog PC Headset, Flexible boom microphone that can be rotated left to right for use on either ear, Increased speed and accuracy of PC speechdriven applications Andrea active noise cancelling microphone technology in a high-fidelity headset that can be easily folded flat for convenient storage On/Off microphone mute switch that allows for conversations that do not disrupt computer telephony and Speech-Driven PC applications during operation Flexible boom microphone that can be rotated left to right for use on either ear Increased speed and accuracy of PC speechdriven applications