These reversing cables can be used in Genteq 3.0 and PerfectSpeed US motors as well as many other ECMs. They are handy to have on hand if you need to change the rotation of your motor.
I've told people about FanHandler already. It is working so well. Our second floor is now only 1 degree different from the first floor compared to 7 or 8 degrees last year. We have also only burned 1/4 tank of oil so far compared to more than half a tank by this time last year. What a great investment!