... E-book format:TXT,FB2,PDF,PDB,EPUB,SKT,HTML e-book reader RockChipModel Number:GK0104049Features: ... adjus. Showing synchronously11.Support auto-turn off (3/5/10/15/20 min.) and Sleep shutdown setup12. ... E-book format:TXT,FB2, PDF,PDB,EPUB,SKT,HTML13.History Skip page from SaveMark/ LoadMark/ DelMark ... can be optional,Private mode can be customized.5.functional software and other function can be customized ...