Oppo Find 7a is the successor to the Oppo Find 5. It has a 5.5in, 2K screen, Snapdragon 801 processor and 3GB of RAM. It also has a 13MP camera that shoots 4K video. At the time of its release it ran on Android 4.3.
Oppo Find 7a has not received the official Android Marshmallow update yet. Instead of waiting for the official update, you can use CM 13 custom ROM which will update Find 7a to Android 6.0. A detailed guide is given below.