The 1203BB DC Motor Speed Regulator controls the speed of a DC motor by adjusting Pulse-Width-Modulated (PWM). It provides a continuous current of 3A to your DC motor or other DC load.<br> Besides, the circuit also includes a 3A fuse, with reverse connection of power supply and control the forward or reverse direction and the stop of DC motor by switch.<br> 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.The switch cable length 15cm.<br> Operating instruction<br> Before you attempting to wire the controller, make sure that the power is off.<br> 1. Connect wires refer to the wiring diagram.<br> 2. Turn on the power, and adjust the potentiometer.<br> 3. The LED indicates the power up and the speed of motor.<br> Colour:black<br> Material:ABS<br> Size:5 x 3.2 x 1.5cm<br> Package Contents:<br> 1 * Motor Speed Controller<br> Warning: Do not reverse positive and negative power loads. This will damage the controller!<br> Only the above package content, other products are not included.<br> Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.