1. [Controller & Driver] Integrated step motor controller and driver functions. It can not only realize motor, but also control the working state of the stepper motor in real time 2. [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 working mode to achieve multi-scene and multi-application 3. [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 4. [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 5. HD LCD display: The HD LCD can clearly display the speed/delay/cycle times, making it easier to browse and set various parameters. Parameters support memory function that will not be lost 6. color: Photo color 7. Material: ABS 8. size: 79 x 43 x 41mm 9. Package Contents: 1 x Stepper Motor Driver Controller 10. Only the above package content, other products are not included. 11. 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.