Hidden Hitch, Prodigy P2 Proportional Electronic 1 to 4 Axle Brake Controller, Universal

Proportional based controls offer a smooth braking response to almost any stop. Through the use of a sensing device, the brake control can determine the tow vehicle's rate of deceleration and then apply the trailer brakes to match. In other words, Proportional controls deliver power to the trailer brakes in direct relationship to the actual physical deceleration of the tow vehicle.