Actually, if your towed rig does not have brake lights working when you apply the brakes, you need to install an optional stop light switch. See page 4 on the install guide.
Also, unlike some other brands, while the even brake does require the brake lights to activate, it does not actually receive a braking signal from your motorhome to know how/when to apply the brakes. Instead, it has an accelerometer built in that detects inertia of the rig and identifies when the brakes are being applied. If you press the brake when the motorhome is parked and the even brake is installed, it will not press the brake pedal. You have to be moving and it detects the braking of your motorhome.
In its setup/test sequence, it will send an error if the brake wire is not properly sending an electrical signal. Hence the need for the optional stop light switch in some cases.
In my case, we wired the vehicle being towed to have brake lights from the RV using the universal wiring kit which includes the diodes.
You can skip that portion if you prefer to use those magnetic tow lights. I chose to wire it as a more permanent solution for my 2003 Chevy Tracker.
I have this evenbrake system. It meets my needs. A few minutes to install and remove each time. The best solution probably is the the brake master (roadmaster) or Air force one that is similar, but I didn't want to cut into the brake lines on my RV and also would have had to give up precious storage space in a compartment on the RV for the compressor.
Some hate the "brake in a box" solutions but it works fine for me.
I use the falcon all terrain as the tow bar setup.