Sony D-NE300 ATRAC Walkman Portable CD Player (Blue) Portable CD player compatible with MP3 files and Sony's ATRAC3plus compression technology; 2-line display with ID3 tag recognition Includes SonicStage CD Simple Burner software to facilitate ATRAC3plus CD burning from MP3 files and from other CDs Skip-free G-Protection technology eliminates or reduces skipping during many active uses Bookmark playback function for easy programming, auto-ranking playback programs your favorites based on listening frequency More than 85 hours extended playback with 2 AA batteries (not included)