iRock! 860 256MB MP3/WMA Player with FM Tuner Flash memory digital audio player compatible with MP3 and WMA 256 MB flash memory stores 4 hours of MP3 or 8 hours of WMA Five preset EQ modes, and four playback modes (normal, repeat one, repeat all, random, and sleep timer) FM radio with 20 presets Up to 30 hours of continuous playback with one AA battery