Anddas Black Computer Studio USB 2.0 Condenser Microphone Mic For Laptop PC Chatting MODEL ITEM:SF-555B USB PLUG.Sensitivity: -47dB4dB Directivity:Noise canceling.Impedance: 2.2K Sensitivity reduction:Within -3dB at 1.5V.Cord length: 1.5 meters/59" Operation voltage:4.5V.Standard operation voltage:1.5V Frequency Response:100Hz-16KHz.S/N ratio:More than 67dB