1、Higher Accuracy: Wide in speed adjustment range, the DC motor speed controller ensures the stable working performance with high efficiency. 2、Standard Design: Supports 220V AC input and 90V DC output, the motor speed regulator enables direct start up when there is DC voltage. 3、Reversible Uses: To reverse the CW and CCW rotation direction of your DC motor, you can changing the wiring between M+ and M‑ terminals. 4、Wide in Fitting: Suits perfectly for 50W, 100W, 120W, 200W, 300W, 400W and so on, the motor speed control switch has flexible application. 5、Easy to Install: Compact in size and light in weight as well, the DC motor speed controller is very convenient to install within minutes. 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.