1) file support: mp1/2/3,wma,wav,acc 2)  built-in memory: 128/256/512mb 3) about 120 mp3 songs (128kbps) for 512mb memory 4)  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) play mode: one/all/random/normal/intro 12) battery: rechargeable lithium  battery 13) battery life: 8 hours or longer play time 14) support 11 system languages 15) colors: red/blue/rose/silver / (any color)