uniquegoods 6V 12V 24V 28V 3A 80W DC Motor Speed Controller (PWM) Speed Adjustable Reversible Switch 1203BB DC Motor Driver Reversing;

Features:

1203BB DC Motor Speed Regulator controls the speed of a DC motor by adjusting Pulse-Width-Modulated (PWM).
  The input power range is DC6-28V .
Control the forward or reverse direction and the stop of DC motor by switch.
Potentiometer with switch function.
The switch cable length 15cm.

Operating instruction:

Before you attempting to wire the controller, make sure power is off.
WARNING: DO NOT REVERSE POSTIVE AND NEGATIVE POWER LOADS.THIS WILL DAMAGE THE CONTROLLER.
1. Connect wires refer to the "wiring diagram" (NO.5 picture).
2. Turn on the power, and adjust the potentiometer.
3. The LED indicates the power up and the speed of motor.

Package Including:

1 x DC Motor Speed Controller