TrekStor i.Beat drive 2.0 512 MB MP3 Player 512 MB flash memory holds 8 hours of MP3 and 16 hours of WMA audio Thumb-drive style with SD/MMC card expansion Integrated voice recorder captures audio in WAV file format Blue-backlit LCD screen; thumb controls; compatibility with Windows, Mac OS, and Linux Powered by single AAA battery for up to 10 hours of continuous play