10X 12V 24V 48V 2000W MAx 10-50V 40A DC Motor Speed Control PWM HHO RC2432. And high quality It is fit all kinds of general-purpose and have a DC motor speed with brush. All kinds of automobile motor car, (car wiper, car fan control cooling fan control, automobile air-conditioning fan speed control motor speed) Conveyor belt of the production line, pipe exhaust fan speed control and running machine control of motor speed, multiple computers parallel speed control, electronic fan speed control. All kinds of dc lamp was dimming, all kinds of dc heater adjust the temperature, This speed governor is the grade quality for the industrial, can work in below freezing environment. Package include: 10 x 40A DC Motor Speed Control.