DBX PA RTA Flat Frequency Response Omni-Directional Clip Case Microphone Polar Pattern : omni-directional Element : back electret-Condenser Frequency Response : 20 Hz - 20 kHz Impedance : 250 30% (at 1,000Hz) Sensitivity : -63 dB +-3 dB ( 0 dB=1V/ microbar 1,000 Hz indicated by open circuit )