Bundle includes APH-2n Accessory Pack and Headphones * 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