After connecting this panel to your Ramps you don't need your pc any more, 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.
Item type: 12864 LCD controller
Color: as shown
1 x 12864 LCD controller, 1 x connector, 2 x 30 cm cable
1 x box packaging
The colors deviation might differ due to different monitor settings.
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ETbotu 12864 LCD Display Smart Controller with Adapter for RAMPS 1.4 RepRap Guru 3D Printer - B07H5D96ZF