Features ✅【START-STOP BUTTON】: PWM Motor Driver with start-stop button and can be external switch control. In addition, With standard 5135 instrument housing for customer installation. ✅【SOFT START FUNCTION】: The motor drive module also has a soft start function. When it is opened, the current will increase slowly, reducing the impact of the current on the module, which can effectively protect the motor and extend the service life of the motor. ✅【DUTY RATIO AND WORKING FREQUENCY】 : DC motor governor can be set duty ratio, upper and lower limit of duty ratio and working frequency, convenient for customers to operate according to their own working characteristics of the motor. ✅【DIGITAL ROTARY ENCODER】: DC brush motor driver adopts digital encoder knob to adjust the motor speed. Compared with ordinary potentiometer, it has good repeatability, high precision, and can be quickly adjusted to the required value. ✅【AFTER-SALES SERVICE】: If you have any questions or needs after receiving the package, please feel free to contact us, we are more than happy to solve all kinds of problems for you. Specification: Item Type:Motor Controller Working Voltage: DC5V~30V, Input Anti-Reverse Protection Rated Current: 5A, Maximum Current 15A Maximum Power: 150W Working Frequency: 1KHz~99KHz Adjustable, 1KHz Stepping, Default Frequency 20KHz, Accuracy about 1% Duty Cycle: 0-100%, 1% Step Product Size:79 x 43 x 26mm / 3.11 x 1.69 x 1.02in All Settable Parameters Are Powered Down. Package List: 1 x Module Note: Digital encoder knob operation In the default interface: (default display duty cycle) Short press - switch motor start and stop Long press - enter the settings interface Counterclockwise rotation - duty cycle reduction Rotate clockwise - increase duty cycle Under the settings screen: Short press - select set parameters and switch between duty cycle lower limit, duty cycle upper limit and work The lower limit of the duty cycle is displayed as “L” + two digits. The upper limit of the duty cycle is displayed as “H” + two digit or “100”. The display frequency of the working frequency is “F” + two digit. Long press - exit setting interface Rotate counterclockwise - reduces the corresponding settings Rotate clockwise - set the parameter to increase accordingly Post STOP port The open key or 3.3v level can be connected externally. When the key is closed or the 3.3V level is lowered, the start/stop state of the motor is switched. Package List 1 x Module