Newest design earphone mp3 player, headset mp3 player, sport mp3 player

1. Portable back-hang design mp3 player. Convenient for sport.    2. Voltage: 3.7V; 3. USB power4. 150mAH rechargeable Li-on battery.  Playing time3 hours;5. USB 2.06. Support MP3, WMA7. Memory up to 4GB8. Key-pressVolume+/- Play/Pause/Previous/Next9. 16 Level volume control;10. LED indication light 11. Speaker Power :2*10mW

many colors: red, black, blue, green, etc.

Newest design earphone mp3 music player with 2G memory