... file formats ,including EPUB, PDF,TXT, HTML, FB2, CHM ... About 20 days reading time HighLight FeatureScreen : 6 inch EINK 4:3 Vizplex ... ,DJVU,DJV,IW4,IW44,FB2,PRC,MOBI,TCRBattery : 2000mAh (about 20 days reading time)Interface: USB2.0 and TF cardDevice Spec Main ... 2s. Faster page flips and file openingLong battery life:15 days for standby, 10,000pages reading after fully chargedSupport High resolution ...