features. They're designed specifically for manual transmission cars. They have a feature where you have to tap the brake to arm it, and the engine won't shut off until you close the door. This ensures you haven't left it in gear, because you've already gotten out of the car with the car still running. If you open the door again, it disarms the ability to remote start it again until you do the procedure all over again. I used to have one on my silver twin turbo combined with my turbo timer, which came in handy on cold mornings when I lived up north.