Sony D-NE900 ATRAC Walkman Portable CD Player Portable CD player compatible with MP3 files and Sony's ATRAC3plus compression technology; 4-line display with advanced text navigation Includes carry pouch, AC adapter, and 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; slimstick backlit remote control simplifies use Bookmark playback function for easy programming, auto-ranking playback programs your favorites based on listening frequency Up to 85 hours extended playback with supplied NH-14WM gumstick battery and 1 AA battery (not included) in external battery case