Super uni- directional electret zoomable interviewing professional condenser microphone energy exchange ; condenser directional : uni-ultra directional frequency response : 100-16000hz output impedance : 1komega for short distance, 2.3k omega or long distance power supply : dc-1.5v sensibility: 5-10mv/pa for short distance,10-15 mv?pa for long distance. super uni- directional electret zoomable interviewing professional condenser microphone energy exchange ; condenser directional : uni-ultra directional frequency response : 100-16000hz output impedance :