Zoom H2n Handy Recorder Over 20 hours of operation using two standard AA batteries Key Control, A-B Repeat, File Dividing, Normalize, MP3 Post-Encode, Marker and Surround Mixer Additional functions include Lo-cut Filter, Compressor/Limiter, Auto Gain, Pre-Rec, Auto-Rec, Tuner, Metronome, Variable Speed Playback Records in WAV up to 24-bit/96kHz and MP3 up to 320kbps File types supported: MAV,MP3