Features Equipped with start-stop button and external switch control to meet various customer control requirements. Motor soft start function. When the motor starts, the current increases slowly, and there is no inrush current, which can effectively protect the motor and prolong the service life. The duty cycle, upper and lower duty cycle, and operating frequency can be set to allow the customer to operate and use their motor based on their operating characteristics. The digital encoder knob adjusts the motor speed, which is more accurate and consistent than ordinary potentiometers. With standard 5135 instrument housing for customer installation. 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 operationIn the default interface: (default display duty cycle)Short press - switch motor start and stopLong press - enter the settings interfaceCounterclockwise rotation - duty cycle reductionRotate 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 workThe 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 interfaceRotate counterclockwise - reduces the corresponding settingsRotate clockwise - set the parameter to increase accordingly Post STOP portThe 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