This full graphic Smart Controller contains an SD-Card reader, a rotary encoder and a 128 x 64 dot matrix LCD display. You can easy connect it to your Ramps board using the "smart adapter" included. After connecting this panel to your Ramps you don't need your pc anymore, the Smart Controller supplies power for your SD card. Further more all actions like calibration, axes movements can be done by just using the rotary encoder on the Smart Controller. Print your 3D designs without PC, just with a g-code design stored on the SD card. Features: Using a large screen 12864LCD With an SD card base on back, put slicing file into the SD card and select the file on the LCD Plug and play on the RAMPS, but need to modify the firmware