Keyestudio LCD2004 3D module includes a SD card reader, a rotary encoder and a 20 character * 4 line LCD.
When this control panel is connected to RAMPS 1.4, you don’t need your PC anymore. The smart control panel supplies power for your SD card. Further more actions like calibration, axes movements can be done by adjusting the rotary encoder on the Smart Control panel. With g-code design stored on the SD card, you can print your 3D designs without PC.