Olympus DM-20 Digital Voice Recorder and Music Player Combination digital voice recorder and music recorder/player with support for DSS, MP3, and WMA file formats 128 MB built-in internal memory offers 45 hours of voice recording or 2 hours of near-CD-quality music Includes 5 file management folders (199 files each); voice activation mode enables hands-free recording USB docking station grants quick, easy uploads and downloads; PC and Macintosh compatible Noise cancellation mode reduces ambient sound; measures 4.31 x 1.56 x 0.6 inches (W x H x D); 1-year warranty