Retail ZK-SMC02 Stepper Motor Driver Controller Integrated Board Forward/Reverse Pulse Speed Angle ControlModule for 42 57Motor [Controller & Driver] Integrated step motor controller and driver functions.It can not only realize the drive motor, but also control the working state of the stepper motor in real time_x000D_ [Forward & Reverse] It can not only change rotation direction by pressing button, but also by potentiometer. It is also automatically change the direction through the selected working mode to achieve multi-scene and multi-application_x000D_ [4 Control Mode] In addition to its built-in parameters work mode,it can also control by external buttons or others driver or UART commands_x000D_ [9 work states] Built-in 9 default workflow programs, covering most applications, to meet the needs of different scenarios.Forward/Reverse/Delay/Loop/Self-locking/No-lock/Rotating speed and so on_x000D_ [HD LCD display] The HD LCD can clearly display the speed/delay/cycle times, making it easier to browse and set various parameters. Realize high-precision control of the motor. Parameters support memory function that will not be lost_x000D_ _x000D_ color:Photo color_x000D_ Material:ABS_x000D_ size:79 x 43 x 41mm_x000D_ _x000D_ Package Contents:_x000D_ 1 x Stepper Motor Driver Controller_x000D_ _x000D_ Only the above package content, other products are not included._x000D_ 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. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_