... *480SDRAM32MMemory storage 8GB (Optional: 1GB-8GB)Extend storage TF card Music formatMP3, WMA, OGG, FLAC, WAV, AAC, APEPicture formatJPEG, BMP, GIFVideo ... TXT, HTML formatBatteryBuilt in Lithium Polymer( 2500 mAH)Standby time Music: 28 hours; Video: 8 hours; reading: 12 hoursBook markSave Bookmark ... -inch E-Book with TFT Touch Panel, Multimedia Functions, 8GB Memory