Audio format:support mp3, WMA,ASF,WMV
2,USB disk:need not drive(except win98)
3,anto power off:auto power off within 30 sec
4,usb2.0
5,storage128m/256m/512m/1g/2g/4g
6,battery:built in lithium battery,display 6H
7,color:silver,red,blue,green and black
8,weight:20g