Features [Control Board]: The highly integrated control mainboard solves the problem that for Ramps1.4 combination interface is cumbersome and prone to failure. [Good Cooling]: The optimized layout and heat dissipation design make the performance of the whole board more stable, and the MOS transistor with low on resistance as driver, has good heat dissipation effect. [Motor Driver]: Adopt on board 4 way A4988 16 subdivision stepper driver board motor drive (2 motor interfaces on Z axes), 3 way PWM DC output (1 way for high current, 3 way for medium current, 2 way for small current). [Power Supply]: Adopt ST original power chip, support 12V-24V power input, with USB interface, which has stable operation and more convenient wiring. [Easy Connection]: Can be directly connected to for Ramps 1.4, 2004LCD control board and 12864LCD control board (no L shaped adapter board, integrated). Feature: 1.The highly integrated control mainboard solves the problem that for Ramps1.4 combination interface is cumbersome and prone to failure. 2.The optimized layout and heat dissipation design make the performance of the whole board more stable,and the MOS transistor with low on resistance as driver,has good heat dissipation effect. 3.Adopt on board 4 way A4988 16 subdivision stepper driver board motor drive(2 motor interfaces on Z axes),3 way PWM DC output (1 way for high current,3 way for medium current,2 way for small current). 4.Adopt ST original power chip,support 12V-24V power input,with USB interface,which has stable operation and more convenient wiring. 5.Can be directly connected to for Ramps 1.4,2004LCD control board and 12864LCD control board (no L shaped adapter board,integrated). Specification: Item Type: 3D Printer Motherboard Applicable Model: For E12 3D Printer Power Input: 12V-24V, with USB interface Connection: Support for Ramps1.4, 2004 LCD and 12864 LCD control board Package List: 1 x 3D Printer Motherboard Package List 1 x 3D Printer Motherboard