Features:
1) MP3/WMA playback
2) High speed USB interface (2.0)
3) Compatible with Windows 98/Me/2000/XP, Mac OS
4) Voice recording, with speaker
5) Repeating function (no repeat, repeat all, repeat current message)
6) ID3 tags, displays lyric, multiple languages
7) Key hold function
8) Memory: 32/64/128/256/512/1024MB flash memories embedded
9) Diameter: 54mm
10) Noise ratio: 90dB with 20kHz LPF
11) Rewrite cycles: >100,000 times
12) Retention period: >123 months
13) Earphone power output: 5mW
14) Output frequency range: 20Hz-20kHz
15) Weight: 33g (without batteries)