Sony MZ-RH1 Hi-MD Walkman MiniDisc/MP3 Digital Music Player Combination MiniDisc recorder and digital audio player with CD-quality sound Plays downloaded Linear PCM, ATRAC, ATRAC3, ATRAC3plus, and MP3 formats Records in uncompressed Linear PCM format; adjustable "on the fly" recording level Dynamic normalizer automatically equalizes volume of each recorded track Measures 3.45 x 0.68 x 3.45 inches (W x H x D); 1-year parts warranty (90 days labor)