1. Use Ali 5667 solution. 2. MPEG 1/2 audio support, support for WMA. 3. Supports recording to WAV or ASF format of document preservation (optional function). 4. Digital sound adjustment, six preset scene. 5. Supports FAT12, FAT16 and FAT32 file system, which is more than Win98 driving procedures. 6. Material: high-rigidity, anti-scratch, wear-resisting material imported from Korea. 7. More different colors for choice. 8. Built-in rechargeable battery, can play for 8 hours.