Mega 2560 R3 Mega2560 REV3
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.
12864 LCD Control Panel for 3D Printer Smart Controller RAMPS1.4 LCD
Mega 2560 R3 Mega2560 REV3 ATmega2560-16AU Board + USB Cable compatible for arduino

Technical Details

Size (LWH): 12.8 inches, 8.3 inches, 1.5 inches
Product Details
Product Dimensions: 12.8 x 8.3 x 1.5 inches
Shipping Weight: 0.6 pounds (View shipping rates and policies)
ASIN : B016KDM5AI