Digital voice recorder internal memory 4 096 mb max recording time 45 h recording formats hvxc mp3 connections headphones microphone features integrated music player built in speaker recording functions voice operated recording vor noise cancellation low cut filter play functions mp3 playback speed control playback formats mp3 number of sound folders 5 number of files per sound folder 99 display lcd speaker diameter 28 mm output mw 300 mw dimen