... normal, pop, classical, etc.) mode * Support TXT, FB, PDF, EPUB, HTM, MOBI, RTF, HTML and other ... off * Support firmware upgrade Support TF card memory expansion Text format support TXT, FB2, PDF, EPUB, ... VOB, DAT, MP4, FLV, 3GP format 5-inch screen size SD expansion card Bookmarks Browse mode: support manual mode ... Auto power off time: support for 3 minutes, 5 minutes, 10 minutes, 15 minutes, 20 minutes, ...