Features Equipped with start-stop button and external switch control to meet different customer control requirements. Engine soft-start function. When the motor starts, the current is slowly increased, and there is no starting current, which can effectively protect the motor and extend the service life. Duty cycle, upper and lower duty cycle and operating frequency can be adjusted so that the customer can drive and operate their engine according to their operating characteristics. The digital encoder knob adjusts engine speed, which is more accurate and smooth than traditional potentiometers. With standard instrument house 5135 for customer installation. Specification:Item Type:Motor Controller Working voltage: DC5V ~ 30V, input protection Rated current: 5A, max current 15A Maximum power: 150W Working frequency: 1KHz ~ 99KHz adjustable, 1KHz step, standard 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 adjustable parameters are turned off. Package List: 1 x Module Note: Use of digital encoder button In the standard interface: (standard display operation cycle) Short press - break start and stop the engine Long press - enter the rotation counterclockwise setting interface - reduced work cycleRotation clockwise - increase work cycle On the setting screen: Short press - Select the set parameters and switch between lower work cycle limit, upper limit for work cycle and work. The lower work cycle limit is displayed as "L" + two digits. The upper duty cycle limit is shown as "H" + two digits or "100". The working frequency display frequency is "F" + two digits. Long press - Finish the setting interface. Turn counterclockwise - reduce corresponding settings. Rotate clockwise - adjust the parameter to increase accordingly. Post-STOP connection: The open button 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 changes. Package List 1 x Module