Its a fully adjustable piggyback air and fuel management computer. It intercepts and modifies map sensor signal to allow you to tune the vehicle it is installed on. You can add or remove fuel point by point at every rpm, and adjust it by throttle position. This will allow you to squeeze the most power out of your car that you can. If you add more mods, retune it to have that mod take full effect. A lot of turbo eclipse talon guys run it, honda guys, i ran one on my avenger so i could tune the nitrous safely.

It will display on our cars:
manifold pressure
throttle position on a 0-100% scale
voltage
tachometer
and it will display active air fuel correction