6V-28V 3A 80W 1203BB DC Brushed Motor Speed Controller PWM With Reverse Switch Feature:  Size: 5 x 3.2 x 1.5 (cm) Input voltage: DC 6-28V Max current: 3A Control the forward or reverse direction and the stop of DC motor by switch. Potentiometer with switch function. The switch cable length 15 cm.   Operating instruction: Before you attempting to wire the controller, make sure that the power is off. 1. Connect wires refer to the wiring diagram. 2. Turn on the power, and adjust the potentiometer. 3. The LED indicates the power up and the speed of motor. Warning: Do not reverse positive and negative power loads. This will damage the controller!   Package Included: 1 x 1203BB 6V 12V 24V 3A 80W DC Motor Speed Controller (PWM) Adjustable Reversible Motor Driver Switch