I have a Prodigy Brake controller and it works well. I do find the instructions confusing how ever. What does the boost feature do and how do you use it and when?

Hi, does the instruction call gain, boost? Gain which gives more braking power, will increase with speed and decrease if you are stopped and pushing on the brakes. The level is automatic and you can manually adjust the gain setting.

Boost is the level it starts out at. When you trigger the brake controler (touch the brake pedal enough to turn on the brake lights on) the boost determines where your controler starts at. For example when you have it set at B1 I think starts at about 7% braking and on B2 it starts at about 12% and B3 is about 25%. and the regular B setting starts at 0 and ramps up from there. I will find out the actuall %ages for you