From Hydrogenaudio Knowledgebase
The iAudio X5 is a portable harddisk-based digital audio player by jetAudio .
Available with 20, 30, and 60GB HDD models.
- Supports playback of MP3, Ogg Vorbis, WMA, WAV and FLAC
- USB 2.0
- FM Tuner
- Direct encoding to MP3 from any analog source
- Does not support gapless playback (even with Ogg Vorbis or FLAC)
Rockbox iAudio Port - 3rd party firmware developing effort which may eventually offer more features.