1. High quality MP3 files playback.
2. Support extend SD/MMC card.
3. Double led.
4. USB 1.1/2.0.
5. USB storage disk.
1. No built-in flash, external memory card (SD card & MMC card for option), flexible capacity upgrade from 16M to 2.2G). 2. Porable storage function, the player can store and files downloaded from PC. 3. USB 2.0 interface high speed data transfer. 4. Music format: MP3. 5. Battery: heavy duty AAA Battery x 1.