... mini USB2.0 (charging), headphone, SD card slotStorage memory: NAND flash Storage capacity: 4GBExternal memory: SD/SDHC (up to 4GB)Supported file ... 800 x480 pixelsOperation: key-pressAudio formats: WAV, MP3, WMAVideo format support: rmvb,rm,avi,vob,flv,mpeg4, etcText formats: TXT ... , EPUB, HTML, PDFPicture format: jpg, bmp, pngSchedule Power off: Support 3 min, 5 ...