... 64MBBattery-----Li-ION 1200mAhBattery Life----7700 screen refresh (est. 3 months based on reading speed of 500pages per week)I/O ... ----"3,5mm stereo audio jack for earphones, USB Port, NO ... wma(32kbps-192kbps), "Font size changing function----5 sizesOther features----page number indication, search book by filename, auto-resume, bookmarkingLanguage----English ...