1) file support: mp1/2/3, wma, wav, asf, mtv 2)  built-in memory: 128/256/512mb/1gb 3) about 120 mp3 songs (128kbps) for 512mb memory 4)  color oled display 5)  movable u disk function 6)  fm stereo tuner: 87.5-108mhz   7)  equalizer control: natural/rock/pop/classic/soft/jazz/dbb 8)  digital voice recorder 9)  32 level digital volume control 10) pc interface: usb 2.0, mini usb 11) 40 minutes video play time for 256mb memory 12) play mode: one/all/ab repeat/normal/intro/speedshift 13) battery: rechargeable lithium  battery 3.6v 14) battery life: around 6 hours play time 15) support 3 system languages 16) colors: red/blue/green/silver / (any color)