Features DC motor controller can be widely used in torsion control and variable speed applications. As long as the voltage applied to the brushed DC motor is changed, the speed of the brushed DC motor can be controlled. Moreover, applicable to 220V DC brush motor, motor governor supports strong practicability. With fence terminal wiring, motor controller adopts linear potentiometer speed regulation method. Motor speed regulator installation is simple, which not require particularly complicated operations. Specification:Item Type: DC motor controller Material: Printed circuit board Size: Approx. 85 x 58 x 38mm / 3.3 x 2.3 x 1.5in Input Voltage: AC 220V Suspension Current: 10A Regulation Voltage: DC 10-210V Wiring Type: Fence terminal Output Voltage: Linear under load Maximum Current: 20A Speed Regulation Method: Potentiometer (linear) Knob Type: 500K with switch Package List:1 x Motor Governor Package List 1 x Motor Governor