sensitivity:-55dB±2dB                                  Directivity:Noise canceling                     Impedance:≤2.2KΩ                       sensitivity reduction: within -3dB at 1V      Operation voltage:1.5V                                           standard operation voltage:1.5V                             Frequency response:50Hz-16KHz                             S/N ratio:>36dB                                          Cord length:2.0m