This intelligent controller includes an reader, an encoder and a 20-character x 4-row LCD display.There simply can be connected using the smart adapter with your RAMPS 1.4 plate. The smart controller by the encoder creates all other operations, such as calibration or axis movement etc. Features - It includes an reader, an encoder and a 20-character x 4-row LCD display. - Can be connected using the smart adapter with your RAMPS 1.4 plate. - After successful connection, the controller provides instead of your computer for the power supply. - The smart controller by the encoder creates all other operations, such as calibration or axis movement etc. - The 3D design is saved by design on the without printing by computer. Package list: 1 * LCD Display 2004 Smart Controller RepRap Ramps V1.4 for 3D Printer