... The longest playing time, audio 28 hours, video 6 to 7 hours e-book here, about 12 hours ... , 35003.display type, 7-inch EC-PAPER technical resolution; 800 * 4804. music supported formats, MP3 ... the order of play, random play Microsoft audio, 3D, bass, volume, balance sound choices, the ... 30 seconds, 5 minutes, 10 minutes, do not lock book function, support TXT, EPUB, FB2, HTML, PDB, ...