mobiBLU B153 512 MB MP3 Player (White) Portable digital audio player with built-in FM tuner and voice recorder 512 MB of flash memory holds 8 hours of MP3 and 16 hours of WMA audio Supports MP3, WMA, and Ogg Vorbis formats; line-in recording to MP3 Internal rechargeable battery charges via USB; Windows or Mac compatibility Measures 2.56 x 1.75 x 0.84 inches (W x H x D); 1-year warranty