Michael: Hi there. I'm Michael with etrailer.com. Today we're going to take a quick look at the Roadmaster 9700 portable supplemental braking system. For those of you who don't know much about the flat-towing process, a supplemental braking system is very important to your flat towing setup.It's going to install in your towed vehicle. It's going to allow that towed vehicle to apply the… see more >