Computer Studio USB 2.0 Condenser Microphone SF-555B Special design for chatting over QQ, MSN, SKYPE and aiming over internet High quality mic, perfect voice recorder High-performance microphone accurately reproduces sound Plug in, and start recording-no extra gear needed USB plug works with any USB-equipped computer 3.5 stereo plug fit for all kinds of PC. Noisy cancellation Specification: Sensitivity:-47dB4dB Directivity:Noise cancelingling Impedance 2.2K Sensitivity reduction:Within -3dB at 1.5V Operation voltage:4.5V Standard operation voltage:1.5V Frequency Response:100Hz-16KHz S/N ratio:More than 67dB Cord length:1.5 meters Package: 1 x Condenser Microphone