1[Durable Material] Stepper motor driver is made of high quality plastic material, which is durable and can be used for a long time. 2[High Efficiency] This stepper motor driver board is noise free operation, highest efficiency and perfect motor torque. 3[Drive Module Use Method] Remove the 3 jumper caps under the socket. The module has no subdivision setting. The step value is calculated according to 16 subdivisions. The chip uses a differential algorithm to expand 16 subdivisions to 256 subdivisions. 4[Stable Performance] Stepper motor driver module is exquisite in workmanship, stable in performance, and can be used with confidence. 5[Current] The current of the stepper motor controller is 4A, and the maximum current is 2A, which can meet your various needs.