Dell DJ DITTY HV04T Owner's Manual page 84

Supported Audio Formats
MP3
WMA
PlaysForSure
Audible files
Supported Operating Systems
Windows XP Home
Windows XP Professional
Appendix
84
Bitrates 8 ~ 320 kbps, Variable
Bitrate (VBR) supported
Bitrates 32~192 kbps, Variable
Bitrate (VBR) supported
Licensed WMA
Format 2, format 3 and format 4.
32 bit, SP 1, Windows Media
Player 10
32 bit, SP 1, Windows Media
Player 10