7 inch electronic book 1.built-in 2800mah Lithium battery. 2.operation ... keypad 3.with FM and G-sensor 7 inch electronic book Power (battery type): built-in Lithium polymer (2 ... ,800mAh) Mode of operation: mechanical keypad E-book format: ANSI, Unicode TXT, Doc, PDF, HTML, FB2 ... once, and repeat all Play mode: shuffle and loop Information display: (ID 3tag) album, song title, and artist ...