With widely frequency response, clear timbre and low noisy. ON or OFF is lock switch, with music indicating function. When microphone opens, the red indication light is on. The gooseneck and the microphone base can be separated. It is suitable for meeting, public communication and broadcast. Model NO.: MIC-300 Polar pattern: Uni-directional Condenser Frequency response:60Hz-15KHz Sensitivity:-45dB +-3dB(1KHz) Low frequency attenuation:125Hz 6dB OCTAVE Output impedance:200 OHM Max input SPL: 135dB SPL 1 KHz At 1% THD S N Ratio:66dB. 1KHz at 1PA Dynamic range:111dB.1KHz at MAX SPL Power supply:DC3V or AC 12V Cable 10M Balanced