Geeetech Iduino Mega2560 (Arduino compatible),RAMPS1.4,StepStick Pololu A4988 stepper driver & Heatsink, LCD12864 Dots Graphic Matrix LCD Module,SD Breakout for 3D Printer Prusa Mendel This is a RepRap kits from which you have options for the LCD smart controller. These Smart Controllers contain a SD-Card reader and an rotary encoder . You can easily connect it to your Ramps board using the 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. Easy to use and high cost-effective.