Super Mini USB 2.0 Microphone MIC Audio Adapter Driver Free for MSN PC Notebook The world's smallest usb microphone Driver-free, plug and play. Advanced digital USB provides superior clarity with the simplicity of a single USB plug-&amp;-play connection. Sensitivity:-67 dBV/pBar.-47 dBV/Pascal+/-4dB Size: 2cm x 2cm x 0.5cm - 0.79inch x 0.79inch x 0.20inch