Digital Audio Recorder 40 hrs Voice Automatic Recording System, ALC: Auto Level Control ON/OFF Sensitivity switch(ALC ON: 2 steps/ ALC OFF: 80 steps), Peak limiter 5 band GEQ (8 presets and USER), HPF Security functionAself timer, Rec monitor, Recycle bin Play-back: MP3, WMA, WAV *WAV PB is only possible to the file recorded by POCKETRAK CX