Andrea Communications C1-1025400-1 Model ANC-300 Hand-Held Computer Microphone, Dual functionality, Three position selector switch (Near Field (Hand-held), Far Field (Desktop) or Mute) Active noise-canceling (ANC) microphone uses acoustic mic technology for superior performance with desktop speech-enabled applications Dual functionality - Use wither as a hand-held microphone for speech dictation or on the desktop stand for multi-party conferencing Three position selector switch (Near Field (Hand-held), Far Field (Desktop) or Mute) Microphone windsock minimizes breath popping Extra-long shielded cable with 3.5mm single plug