Input voltage range: dc10-60v Applicable current range: continuous current within 10a, maximum current 20A Speed range: 5% - Application: the motor governor can be applied to electric stove, water heater heat regulation, dimming lamp, small motor speed control, electric iron thermostat, etc. Made with circuit board which ensures a longer service life. Matters needing attention:1. When the DC motor speed controller inputs DC power, it cannot be directly connected to AC power (such as household use)Otherwise, it burn out 2. The positive and negative poles of the DC power supply cannot be reversed, otherwise the speed regulator be 3. Motors are not divided into positive and negative directions. When the direction of operation is different from the expected direction, it can be adjusted by adjusting the wiring sequence Change direction. 4. The potentiometer knob can change the duty cycle of the governor output, thereby changing the motor speed.652F PWM DC Motor Governor 12V 24V 48V 20A High Power Controller Waterproof Color: As Shown Material: plastic Package Contents: 1 x 20A DC Motor Motor Regulator Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.