The unit offers 4 modes-eco,city,sport,sport plus and each mode has -/+ 1-4. You are able to tune the throttle sensitivity to your liking. It helps get rid of the throttle response delay and it will provide instant power with minimal throttle.Interested, but just had a question first. I have a Scat Pack, how would this help? I already have factory sport mode and have acquired track and eco mode. How could this help me beyond that?