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Here is an explanation of the diiferent types of controllers out there:

"Brake controls are designed to apply the brakes of the towed vehicle (trailer). There are three types of brake controls on the market today timed, inertia, and proportional. Another type of braking system that is used for trailers is a breakaway kit.

Timed Controls
Timed based controls generate an output signal that increases over a period of time. The time based controls apply braking power at the fixed rate that is not proportional to the pressure applied to the brake pedal.

Inertia Controls
Inertia based controls work very much like Timed based control in that they apply braking power at a preset rate during normal stopping conditions with one very important difference. Inertia controls have a patented "Automatic Over-Ride" system with a separate power supply for unexpected high speed stops.

Proportional Controls
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.

Breakaway Kit
A breakaway kit is designed to apply to trailer electric brakes in the event that the trailer becomes disconnected from the hitch while in motion. This kit is required in many of the States and Provinces."

I have tried 2 different proportional controllers: the Teknosha Voyager and Prodigy. The Voyager was installed by my camper dealer and, to be honest, did a fine job. It was a bit harder to set up than the Prodigy (it has to be installed level and is a bit finicky to adjust), but once set up, it worked well. When I bought my new truck and camper, I decided to install the Prodigy and see what all the fuss was about. The Prodigy doesn't care about level and was very easy to setup and adjust. Worked very well when I had both trailers and towed them with the Prodigy. Easy to adjust between the two. Given a choice between the $60 Voyager and the $100 Prodigy, the Prodigy wins hands down.

There is a fourth type of controller that is reportedly even better than the Prodigy. That is the Jordan brake controller. It actually has a cable that attaches to the brake pedal arm and it uses that to send the braking signal to the trailer. Haven't used one, but everyone that has one loves it.

If you are buying your first controller, I feel that the Prodigy (since updated to the V3) is well worth the $100.

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