Function: 1. Equipped with start-stop button and external control switch to meet different customer control requirements. 2. Engine soft start function. When the motor starts, the current rises slowly and there is no starting current, which can effectively protect the motor and extend the service life. 3. The duty cycle, upper and lower duty cycle and operating frequency can be set to allow the customer to operate and use the motor based on its operating characteristics. 4. The digital encoder knob adjusts the motor speed, which is more accurate and consistent than ordinary potentiometers. 5. With standard 5135 instrument housing for customer installation. Specification: Item Type: Engine Controller Working voltage: DC5V 30V, input reverse protection Rated current: 5A, maximum current 15A Maximum Power: 150W Working frequency: 1KHz 99KHz adjustable, 1KHz step, default frequency 20KHz, accuracy about 1% Duty cycle: 0-100%, 1% step. Product Size: 79x43x26mm/3.11x1.69x1.02in All adjustable parameters are disabled. Package List: 1 x module Note: Encoder digital dial In the default interface: (default display duty cycle) Short press - switch motor start and stop Long press - enter the setting interface Counterclockwise rotation - duty cycle reduction Rotate right - increase duty cycle Below the settings screen: Short press - select set parameters and switch between duty cycle lower limit, duty cycle upper limit and work. The lower duty cycle limit is displayed as "L" two digits. The duty cycle upper limit is displayed as "H" two digits or "100". The display frequency of the working frequency is "F" two digits. Long press - exit the settings interface Rotate counterclockwise - decrease the corresponding settings Rotate right - set the parameter to increase accordingly Post STOP port Open key or 3.3V level can be connected externally. Closing the key or lowering the 3.3V level switches the engine start/stop state.