A pair of condenser microphones (the same as the ones in TASCAM's DR-series recorders) plugs into your Apple device's dock connector. The mics are adjustable over 180 degrees for the best sound placement; the uni-directional elements are arranged in an AB pattern for detailed stereo imaging, while capturing the ambience of your room.
The iM2 contains its own mic preamp and A/D converter to maximize audio quality. Unlike mics that use the built-in iPhone preamp, the iM2 can handle up to 125dB sound levels to capture loud concerts and instruments without distortion.