from what i can tell, this box does not offer any mechanism to change the operation of the motor.
it's basically a data logger. you connect the system to the following - tach, O2 sensor (which you need to install), and throttle position sensor (TPS). once it's in place, it will record the air-fuel ratio over some period of time, which can then be later displayed on a computer.
there are no provisions to control the air-fuel ratio, just record it.