Patriot by Blue Ox BRK2010 RV Supplemental Braking System Unit and Controller. The unit was installed and tested for operation and it worked. I was having trouble getting the controller to sync up to the unit. But it does work without the controller as well. If  you want the break away unit ebay sells them for around $65 for the unit and cord. Not sure but the cord for break away unit might have to be plugged in for the controller to sync up. Anyway selling a working unit but as i said the controller was iffy. 

Small, light, and precise, this portable unit gets you smooth braking with basically no installation. Plugs directly into 12V outlet. Easy to swap between multiple cars. Control and monitor. Most portable systems can't match." How Does the Blue Ox Patriot Work? The Patriot uses a built-in inertia sensor to detect

The  manuals and paperwork are all in the original box. 

No Returns so make sure its the one you want and need. Read entire description before purchase. Thank you