<b>Features:</b> <br> <br> 1203BB DC Motor Speed Regulator controls the speed of a DC motorÂ by adjusting Pulse-Width-Modulated (PWM). <br>Â  The input power range is DC6-28V . <br> Control the forward or reverse direction and the stop of DC motor by switch. <br> Potentiometer with switch function. <br> The switch cable length 15cm. <br> <b>The mini index dial is a gift free,it help you adjust the value accurately.</b> <br> <br> <b>Operating instruction:</b> <br> <br> <b>Before you attempting to wire the controller, make sure power is off.<br> WARNING: DO NOT REVERSE POSTIVE AND NEGATIVE POWER LOADS.THIS WILL DAMAGE THE CONTROLLER.</b> <br>1. Connect wires refer to the wiring diagram (NO.6 picture). <br>2. Turn on the power, and adjust the potentiometer. <br>3. The LED indicates the power up and the speed of motor. <br> <br> <b>Package Including:</b> <br> <br> 1 x DC Motor Speed Controller <br> <b>1 x index dial (a gift free)</b>