Key specifications/special features:

Feature
Audio formats supported: Mp3(32 to 320 kbps), MP3 vbr, WMA, WMA with drm, ogg
Support wmdm(windowsmedia device management) standard
External voice recording(dvr)of high sensitivity including line-in
Audio line-in and voice record
Support on-machine playlist editing
Twenty preset eq adjustment and five genre eq adjustment
Playtime: Up to 10 hours(chargesup to 90% of battery capacity
Firmware upgradeable through USB port.
Specification
Storage media:1" HDD(22gb or 4gb)
Noise ratio:90db
Frequency range:20hz~20khz
Power AC input:100v to 240v/frequency:50hz to 60hz
Maximum playing time:10 hours
Earphone:50mw
Dimension:91x 57x 17mm
Weight:90 g
Windows os: Windows 98se/me/2000/XP or mac os 8.6 and later
Data transferring interface: USB 2.0
Repeat: Repeat 1/repeat all/random
LCD:33.8 x 22.2 mm,128 x 64 stn dot matrix