... Lithium Polymer( 2500 mAH)Standby time Music: 28 hours; Video: 8 hours; reading: 12 hoursBook markSave Bookmark ,Distill Bookmark,Del BookmarkPowerDC ... USB 2.0 Language Chinese,English, Russian, Spanish,Italian, French, German, Polish,Portuguese, Dutch 7 inch TFT rk2738 touch panel digital photo book reader ...