Features: All the functions set on a board to solve the problems that Ramps 1.4 has cumbersome combination interface and easily fail to work. Adopt 4982 as a motor driver, its performance is the same as 4988, but cooling effect is better. The circuit board is made of 4-layer circuit, and is optimized for heat dissipation. Ramps just has 2 layers. Using high quality MOSFET tube, the heat dissipation effect is better. Adopt special power supply chip, support 12V-24V power input, and solve the heating problem of Ramps voltage conversion chip. Can be connected to Ramps 1.4, 12864 LCD and 2004 LCD control board.