Edutige ETM-001 - Electret condenser microphone; directional characteristic: omnidirectional; sensitivity: -23dB (1kHz at 1Pa); frequency response: 50 Hz - 18 kHz; signal-to-noise ratio (S/N rate): 58dB; 3.5 mm TRS jack plug; for connection to cameras, camcorders, PC/notebook and digital dictation machines