1. Cheapest mp3 player is best choice for gift or promotion products 2. Support MP3/WMA music format 3. Direct USB plug,convenient for connecting to PC 4. LED indication 5. Building-in 64M-1GB flash memory is optional 6. Play/pause/stop music; 7. Skip next/skip previous track 8. Vuloume+/- adjust. 9. Single AAA battery can play for over 10 hours