Four microphones - Stereo Cardioid and Omni Condenser Mics 44.1k to 96k sampling rates for WAV file recording MP3 and WAV file Recording and Playback XLR Mic Inputs with Phantom Power High-performance microphone preamp with 60dB of gain Premium AKM Audio4Pro™ A/D converters with over 100dB signal to noise ratio 3.5mm Line Inputs and Outputs Low Cut Filter, Analog Limiter and Auto Gain Control Built-in Speaker Integrated microphone stand mount Runs on Rechargeable Li-Ion Battery or AA Batteries Optional PS-P520 AC power adapter Dimensions: 3.2" W x 1.4" H x 6" D (80.5mm x 35mm x 151mm)