The 1803BKW DC Motor Regulator controls the and direction of a DC motorby adjusting PWM. It provides a continuous current of 2A to your DC motor or other DC load. Besides, the circuit also includes a 2A fuse, with reverse connection of power supply and control voltage over-voltage protection function. Features - Input supply voltage: DC1.8V-15V. - The maximum output power: 30W. - The maximum continuous output current: 2A. - Duty cycle adjustable: 5%-100%, potentiometer with switch function. - Item size: 1.3*1.3*0.6inch. - 1803BKW DC Motor Regulator controls the of a DC motorby adjusting Pulse-Width-Modulated (PWM). - Use a 2A resettable fuse to protect the controller. - Potentiometer cable length: 20cm. Operating instruction Before you attempt to wire the controller, pls make sure that the power is off. Warning: To change motor direction, interchange the positive and negative wires of motor. - Connect wires refer to the wiring diagram. - Turn on the power, and adjust the potentiometer. - The LED indicates the power up and the of motor.