Philips EXP401 Pocket eXpanium CD-MP3 Player with 100 Second Anti-Skip 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 100-second electronic skip protection (above average) 3-hour playback with 1 AA alkaline battery UDF support (record data files using drag-and-drop); earbud headphones and AC adapter included