It is a PWM speed controller that allows you to control the speed of these brushed DC motors smoothly. It is ideal for applications such as car engines, DC heaters, light bulbs, etc. allowing a pleasant adjustment of the motor speed.Features: A wide voltage range, 10-50V, 40A, max. 2000W for motor speed control and HOO. Stable in work, high efficiency and low noise. Field effect tube, driver IC, 70m copper foil PCB for greater efficiency of PWM wave generation. Potentiometer for speed adjustment, protective case creates better durability. Specific Power Control: 12V: 480W; 24V: 960W; 36V: 1440W; 40V: 1600W; 50V: 2000W PWM Working principle: By changing the duty cycle of the square wave signal (output) to adjust the current average power from 0-100% load, thus changing motor speed or light brightness. Main applications: 1.Universal DC brush motor speed control. 2.Control motor speed of cars (eg. vehicle cooling fan motor, car fan motor, automobile car windshield wiper, air condition fan motor).You'an store products