... Lithium polymer (2,800mAh) Mode of operation: mechanical keypad E-book: ANSI, Unicode TXT, Doc, PDF, HTML, FB2, PDB,and ... MP4, DAT,H.264, VOB, MPG, and MPEG 720PFile types: Music: MP3, WMA, FLAC, AAC, OGG, and WAV Photo: JPEG ... , and artist File browse: list Others: show photos and listen music at the same time Shutdown: (auto shutdown) off, 3, ... USB port: USB 2.0 7 inch TFT digital electronic book