Motor Speed Controller Pwm DC 12V 24V 60V 500W Adjustable Speed RegulatorFeature: 1: Using two original high voltage low resistance MOS transistors, as well as pre driver, better performance and more stable, support high voltage and high power. 2: The duty cycle, the upper and lower limits of the duty cycle and the working frequency can be set, which is convenient for customers to operate and use the motor according to its working characteristics. 3: The digital encoder knob adjusts the motor speed, which is more accurate