SPECIFICATION 1. Solution: SIGMATEL 3502 2. No LCD display 2. Support MP3 and WMA music format 3. Direct USB port connect with computer 4. USB drive (Full speed USB2.0) 5. Built-in rechargeable Li-polymer battery for 6-hour playing 6. Capacity of built-in flash memory: 64MB-1GB 7. Five colors are available: white, pink, yellow, blue, black