1. Quartz chip, support MP3/WMA/WAV audio format file.
2. Bit rate: 32kbps-256kbps.
3. Working temperature: -20℃～+70℃.
4. Frequency range: 20Hz~20KHz.
5. Earphone output: 5MW+5MW.
6. PC port: USB 2.0.
7. Operating system: Windows98/2000/xp/me/nt Mac OS 8.6 or higher.
8. U-disk function.
9. Battery voltage: 3.7V.
10. Charging voltage: 5.1V.
11. Playing time: over 9 hours.
12. Charging time: about 1.5 hours( need about 4 hours for first charging).