This product is very nice and having best features, as my father is using this mobile from so many days. OPPO A7 's battery back up is very nice i, s.4230mAh battery very good , dual camera front camera 16 mp and full screen display , 4k clarity are very nice , security of this mobile is best , having finger print technology I face unlock, pattern , password , etc . It is very speed because it has 4gb ram , 64gb rom