voice recorder 1.MP3 function 2.Playback 3.8-12 hrs recording time 4.Play format:MP3,WAV Multimedia Recording Lighter1. ... to 8-12 hours3. playback using cyclic format4. MP3 function5. Recording format: WAV6. Recording time :8- ... 12 hours 7 .Play formats: MP3, WAV8. Computer System: windows 97,98,2003, XP, ... 95*35(mm) 2012 New Arrival hidden Digital Voice Recorder with MP3 player