1. Portable and user friendly,Patented MP3 watch 2. Support recording function 3. Support a-b repeat function 4. Supports MP3/WMA format 5. Memory unit built-in 64MB-4GB flash memory 6. Port round 4 pin USB port 7. Build-in hi li-ion rechargeable battery(3.7v) 8. Dual charging methods: (1)USB cable (2)AC adapter/transformer 9. Shockprooof without sound jumping 10. Red/Green/Yellow light indicator Technical parameter: 11. Battery life about 5 hours continuous playing when fully charged 12. USB transmission rate USB2.0(High Speed) 13. MP3 compression rate 32kbps to 256kbps 14. Record frequency 32khz; Recording time 260minutes(128mb) 15. Output frequency rate 20hz to 20khz 16. Earphone output 4mw+4mw(16) 17. Operating platform window98/me/nt/2000/XP or above