Star A3 with battery cover MTK6573 4.0" Capacitive screen GPS WIFI ... is that it have a spare battery back cover,which will last a longer work time.You ... other further information ,please feel free to contact with us.Thanks for visiting our store,and enjoy your ... handwritten, phone book( 2000 pcs) E-Book and Calendar Calculator , Alarm, Clock,English-Chinese InterpretationOther Added-on featuresCan ...