Features:
1. Support MP3/WMA music format 
2. Necklace style,Touch button,forward,next,volum+,volum- 
3. Can be used as USB flash disk
4. Windows98/ME/2000/XP(NO driver needed for windows 98 above )
5. Wihtout screen display
6. Built-in rechargeable battery,be charged through computer for only 1 hr,play 5 hrs.
7. USB 2.0 High speed interface
Specifications
1.  Size:42 x 14 x 7mm 2.  Weight: 18 g 
3.  Power: Rechargeable battery
4.  Data transferring interface: USB 2.0 High Speed
5.  Storage media: nand flash memory (128M /256M/512M/1G/2G/4G)
6.  Bit rates:  MP3 format 8~320kbps  WMA format 32~384kbps
7.  S/N ratio: 90dB    
8.  Earphone O/P: 50mW
9.  Frequency response: 20Hz~20kHz