Features:
1) 20GB 1.8" hard drive
2) USB2.0 hi-speed (USB1.1 backward compatible)
3) SD/MMC compatible
4) Touch panel control
5) Aluminum metal casing
6) Supports dot matrix LCD display with LED backlight
7) LCD size: 28 x 28mm, 128 x 128 pixels
8) Supports ID3 tag
9) Lyrics display and text viewer
10) Supports MP3, WMA, DRM WMA, ADPCM files
11) Line-in recording, voice recording
12) Built-in music library browsing method
13) USB/ DC charging
14) Supports multiple languages
15) 4min anti-shock buffer
16) 17 hours playback time
17) Firmware upgradeable
18) Size: 67 x 96 x 18mm
19) Weight: 150g

Optional features
1) FM tuner
2) MP3 line-in encoding
3) Exact playtime is model dependent