SainSmart 2-in-1 3D Printer Mainboard Controller Panel for RepRap Arduino, Combination of Mega2560 R3 and Ramps 1.4 Accept 24V power supply input Decrease 1/4 current of the heatbed to solve the heating problem of MOS Use Marlin software as Ramps 1.4 Connect Ramps 1.4 LCD2004 and LCD12864 directly Reserve pulse motor and direction output ports to make it convenient to connect heavy current motor driver (eg. 2A/5A)