Boy do I wish I knew then what I know now...Long story short, I bought the wrong vehicle for towing. Although it can tow up to 3,500 lbs it came with only a 4-pin connector at the back (Just lights, basically).What the dealerships and commercials don't tell you is "upgrading" to a 7-pin requires splicing into the wiring under your dash and connecting a wire up to your battery. It voids your warranty!This thing can adapt your 4-pin to a 7-pin, allowing you to connect a trailer to your truck/SUV... It does not provide the brake signal or power, you have to do that. For power, I recommend a 12V cigarette-lighter adapter. I got one on Amazon and I connected it to this adapter (You connect it to the black wire) to provide 12V (grounded) power to the trailer.For the brake-signal, if your trailer has electric-brakes, check out the wireless brake controller from CURT ("CURT Echo").I did not use the mounting bracket because I wanted to have a full brake-controller setup that I can quickly disconnect/remove (Leaving nothing behind, not even a screw hole...).