... :TXT,FB2,PDF,PDB,EPUB,SKT,HTML digital e-book readerModel Number:GK0104049Features:1.Solution:RockChip2.Resolution ... polymer Lithium battery 3.7V/2500mAh8.Language: Total support 18 countries' language9.Support: picture + music,Support Sound ... /10/15/20 min.) and Sleep shutdown setup12.E-book format:TXT,FB2, PDF,PDB,EPUB,SKT, ... and other function can be customized. 18 countries' language e-book reader