SanDisk Sansa m230 512 MB MP3 Player (Blue) Lightweight flash memory digital audio player--weighs just 1.5 ounces 512 MB memory holds 8 hours of MP3 and 16 hours of WMA audio Microsoft PlaysForSure support for compatibility with wide range of online stores and subscription services Integrated FM radio with 20 presets; built-in microphone and voice recorder Powered by single AAA battery, for up to 19 hours of usage