iSK CM-20Q Omni 360 Condenser Microphone Element: 16 back electret condenser, Polar Pattern: Omni-directional Frequency Response: 30hz - 18khz Sensitivity: -38dB3dB (0dB=1V/Pa at 1kHz), Output Impedance: 100ohms +/-30% (at 1khz) Self Noise: 20dB A, S/N Ratio: 74dB, Max. Input SPL: 135dB (at 1kHz1% T.H.D) Power Requirement: 9-52v Phantom Power (through balanced XLR cable)