Demco (Formerly SMI) Vehicle Kit for Air Force One SBS Stay-IN-Play
Roadmaster Brake master, InvisiBrake
Brake buddy,
Blue ox supplemental braking system

, Supplemental Proportional Braking System Installer All systems
• …will bring your towed vehicle into compliance with  DOT. requirements.
• …include an emergency break away system, to stop your towed vehicle should it ever Breakaway from the motorhome.
• …work in virtually any vehicle.
• …work in virtually any motorhome Gas engine Or Air brakes.
• …greatly decrease your stopping distance.