Mp4 player 1) built-in 128/256/512mb flash(optional), sd/mmc card (max 1g) 2) usb2.0 3) seven eq modes: pop, classic, disco, jazz , soft, dbb and normal 4) support format: mp3, wma, wav, aac, act, asf, amv, mtv, adpcm 5) output power: 2x10mw 6) frequency response range: 20hz---20khz (0.5---1.3%) 7) snr: >=90 db 8) record time: 128mb-30 hrs (act format), 8hrs (wav format) 9) fm: w/fm radio 10) video frequency rec: av in 11) video frequency output:: av out(ntsc/pal) 12) support three languages (simplified/traditional chinese/english) 13) synchronized words of song display; a-b repeated 14) convert jpeg, gif, swf picture files or else to pic files to be viewed by mtv, e-book function; support text file, games, calendar, e-book. 15) .Built-in lithium battery 3.7v 1800mh 3-4 hrs charging time 16) low power design: allows 6-10 hrs of continuous operation; 17) 2.5" and 260000 true color display(128x128) 18) color: black \silver 19) dimension: 90x60x18 (mm); 20) weight: 120g 21) attachments: usb data cables / charger / installation disc /instruction / earphone / inner and outer packing. 22) operating sys: windows 98/me/2000/xp