TrekStor i.Beat xtension 1 GB MP3 Player with FM Radio (Black) 1 GB of built-in memory stores about 20 albums; support for MP3, WMA, and WAV format audio files Stereo FM radio; voice recording and direct recording from radio Expand storage with SD/MMC memory card slot Up to 8 hours of playback from a single AAA battery Features high-speed USB 2.0 interface; use as mobile USB storage device