... 6 to 7 hours e-book here, about 12 hours, 35003.display type, 7-inch EC-PAPER technical resolution; 800 * 4804. music ... seconds, 30 seconds, 5 minutes, 10 minutes, do not lock book function, support TXT, EPUB, FB2, HTML, PDB, PDF, DOC format ... selectable / font amplification fine design white or black 7inch E-book