keeps the car idling for a set ammount of time then shuts off... that way after running around in boost for any ammount of time and then parking doesnt let the turbo sit there and boil the oil to hell and back and create big problems... its for people who dont know how to sit there for 3 minutes and let their car idle... you can do the same thing with a car remote start kit.... just dont engage the starter wire... when u drive it hard, just push the button and engage the alarm's ignition relay... after 3 minutes or so it turns off automatically or if anyone gets in teh car and presses the brake...