Easy to Install: Compact in size and light in weight as well, the DC motor speed controller is very convenient to install within minutes Wide in Fitting: Suits perfectly for 50W, 100W, 120W, 200W, 300W, 400W and so on, the motor speed control switch has flexible application Standard Design: DC Motor Speed Controller supports 110V AC input and 110V DC output, the motor speed regulator enables direct up when there is DC voltage Reversible Uses: To reverse the CW and CCW rotation direction of your DC motor, you can changing the wiring between M+ and M- terminals Higher Accuracy: Wide in speed adjustment range, the DC motor speed controller ensures the stable working performance with high efficiency, Weight: 0.6834330122 pounds, Manufacturer: Oewwthy