The DC Speed Controller will allow you to control the speed of the actuator by turning a knob. It will not increase the speed, only control the speed from the maximum rated to zero. The DC speed controller is perfect to use in the applications where the speed of the actuator varies. The DC speed control can be used together with a rocker switch, please see our wiring diagram under the Downloads section. Features inlcuding reverse polarity, high current protection and high efficiency.