Lets you use trailer brakes on any vehicle without a trailer brake controller as long as it has a 7 pin connection.
Trailer settings changed with app but app is not needed for it to work.
Review/demo video
https://youtu.be/suwIoKjakxA?si=tNfyNynR92OwIJMR
Brand new installed on truck 1 time for a few minutes when I learned it wouldn't work for my truck.
Found out it won't work with my truck due to my truck being wired wrong.
Getting rid of the truck so I don't need this, store I bought it from will not take it back unless it's not working.
Paid over $350 for it just trying to recoup some of my loss.