1. music file:wma/mp3 2. sunglass:polarized lens,tr 90 frame,shock proof and anti-static electricity,against uva/uvb/ uvc light 3. memory:256mb,usb ver.2.0 drive 4. hi-fi stereo earphone 5. integrated microphone supporting adpcm recording 6. battery:230mah/3.7v macromolecule polymer li-ion rechargeable battery 7. battery playtime:2 hours for fully charged,8 continuous hours playing time 8. colors for choice:black/pink/white/blue 9. bluetooth function applied,compatible with bluetooth mobile and facilities.