Sienoc Super mini USB 2.0 Microphone USB Plug Small Mini Desktop Studio Speech Recording Microphone For Skype Msn Video Win 7 Win8 Smallest USB Microphone in the world! Works without drivers: just plug it in to your Windows PC for an instant microphone Good for Voice Dictation Software or Skype Ultra Portable, leave it plugged in to your laptop / notebook 1.Recommend effective distance is 1-2m 2.Some Pcs need to manually switch the microphone. 3.Use this item in the front of PC 4.Turn up the microphone volume