... Large memory card to store what you want E Reader roduct Name:E-book readerMaterial:ABS plasticSize:7 inchResolution:800*480 ... pictures by 0,90,270 degrees.browse history Functions:E-book reader, bookmark, Enlarge font, calender,date,time.Automatically ... longest playing time:28 hours for audio output,6-7 hours for video output,12hours for e-book reader,about3500pages. Languages supported:Simplified ...