GLS Audio Instrument Microphone ES-57 & Mic Clip - Professional Series ES57 Dynamic Cardioid Mike Unidirectional - For Instruments, Drums, Percussion, Vocals, and more Uni-Directional Dynamic Instrument Microphone Frequency Response: 50 Hz - 15,000 Hz Sensitivity: -72dB at 1,000 Hz (Open Circuit Voltage) Can be used with Lo-Z XLR 3 Pin Balanced & Hi-Z 1/4" Impedance: 300 ohms at 1,000 Hz