voice recorder 1.MP3 function 2.Playback 3.8-12 hrs recording time 4.Play format:MP3,WAV Multimedia Recording ... . Recording time :8-12 hours 7 .Play formats: MP3, WAV8. Computer System: windows 97,98,2003, XP, ... Win7, Vista9. Battery capacity: 350MA10.USB transmission speed: USB2.011. Support Maximum Memory: 32GB12. ... *35(mm) 2012 New Arrival hidden Digital Voice Recorder with MP3 player