Features
1) Necklace MP3/WMA player
2) NO DISPLAY, Touch keys.
3) Support the music format of MP3/WMA
4) Windows98/ME/2000/XP(NO driver procedures are needed above windows 98)
5) Built-in lithium battery
6) USB 2.0 High Speed interface

Specifications
1) Size:42 x 14 x 7mm
2) Weight: About 18 grams (with battery)
3) Power: Rechargeable battery
4) Data transferring interface: USB 2.0 High Speed
5) Capacity: (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