The Reese Towpower BRAKE-EVN brake controller offers advanced proportional braking by applying brake pressure to match the vehicles deceleration rate. Proportional braking gets you get smoother stops that traditional time based controls. The boost feature gives the ability to apply more initial braking at the onset of stopping when towing heavier loads. When adjusted properly for your load, proportional brake controls can even extend the life of your vehicles brakes. The large LED display is easy to see when adjusting the control to handle the weight of your loaded or unloaded trailer. The BRAKE-EVN brake control can handle up to brake 4 axles and offers a simple plug in installation option, so be sure to get the proper factory harness for your vehicle. The perfect choice for light or heavy trailer loads.