1. Support 128MB/256MB/512MB/1GB 2. Playback MP3/WMA multi-format files; 3. USB direct plug; 4. Support lyrics display; 5. Firmware upgradeable; 6. 7 types of EQ mode DBB, Pop, Rock, Jazz, Classic, Normal, Soft; 7. High quality voice recording; 8. Support up to 9 folds of music and 99 files in each fold; 9. Resume to the track time before power off; 10. A-B repeat, selected content repeat function; 11. Support Multi-language; 12. 1 AAA battery.