CJRSLRB 3D Printer Smart Controller RAMPS1.4 LCD 12864 Control Panel Blue Screen Display Using a large screen 12864LCD. With a SD card base on back, put slicing file into the SD card and select the file on the LCD, then can be printing. Product comes encoder parameter adjustment can be achieved, and the file selection print. Plug and play on the RAMPS, but need to modify the firmware to support. This version is an upgraded version of reprap smart controller.