I use RVI 2, two years now no complaint. Like any system double check that system is not applying pressure to brakes, until you want it to. The wireless receiver plugs into 12vt in dash. The power for unit comes from live 24 12vt in vehicle. I tow a Chev Equinox
Logic will carry you from point A to point B. Imagination will carry you everywhere. "Albert Einstein". 2011 Georgetown 360, Bride of 45yrs, and 2014 Chev Equinox toad, what more could you ask for.