Trailer Brake Controller - LED Display, Remote Control

...Monitor your braking and trailer connection with the easy-to-read LED screen Built-in safeguards protect your vehicle and trailer Minimizes drain on car battery when not in use Prevents trailer brakes from...

...you'll use the button marked A to decrease the setting and the button marked B to increase the setting. On the top of the module is a red LED light that will blink to signal which setting it's on...