Philips EXP411 Pocket Expanium MP3-CD Player Enjoy more than 3 hours of music from one 8-centimeter MP3-encoded CD Supports MP3 and AAC formats, audio CD, CD-R, and CD-RW Above-average (100-seconds) electronic skip protection 6-hour playback with 1 AA alkaline battery UDF support (record data files using drag-and-drop); earbud headphones and AC adapter included