Graphical display with the printer controller and an integrated memory card reader - reprapdiscount full graphic smart controller.
You can also find the reset button and contrast controller.
Package contains - cable and adapter to connect electronics Arduino Mega 2560 + 1.4 Ramps or eg. main board Rambo / RamboMini.
Detailed information about the scheme or modify the firmware using this type of display can be found here.