This control board is a 32-bit MCU control board, which runs faster, the maximum no-load speed reaches 40000mm/min, the algorithm is optimized better, the vibration of the machine is smaller when the machine moves at high speed, and the performance is more stable; Using the Type-C USB interface, it is more convenient to use and the data transmission is more stable; Support external drive, the reserved interface for external drive is consistent with the high-power drives on the market, which is convenient for wiring; The control board power supply and line number circuit are isolated by optocoupler, the whole control board is and more stable; Y- dual drive, stronger drive capability;Support USB automatic identification. When plugged in USB and connected to the computer, it automatically shield the offline interface to avoid offline interference with data. At the same time, it supports external buttons, which can switch offline/USB control with one key; There are long strip-shaped mounting holes on the shell, which is convenient for the installation of devices;Reserve 24V, 12V, 5V power output ports to facilitate the expansion of functions; Support USB flash firmware, firmware upgrade is more convenient Product Parameters: Product Name:4 3.0 Product Specifications:4 Product Size:122mm x 87mm Product Weight:300g :Window/Linux/ Interface Type:TypeC Supply Voltage:DC24V- 5A Style:B Colour:As shown Material:Metal Package Contents: 2 x 4 3.0 Control Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.