TrekStor i.Beat Drive 256 MB MP3 Player with SD/MMC Expansion Slot (Silver) Compact MP3 player with 256 MB flash memory and SD/MMC expansion slot Supports MP3, WMA, and WAV audio formats; built-in digital voice recorder Playback options include repeat play (1 or all tracks), shuffle, and intro play Direct USB 2.0 interface for easy connection; runs on single AAA battery Measures 3.8 x 1.2 x 0.9 inches (W x H x D); 1-year warranty