Type: CM-47K/47N/47P/47R Element: Back electret condenser ; pattern: Uni-directional ; Frequency response: 40Hz-18KHz ; Sensitivity : -47dB±3dB (0db=1V/Pa at 1KHz); Output impedance : 200Ω±30%(at 1KHz) standard operation volrage : 48V(9-52V Phantom Power)