I have a Greddy Turbo Timer. I don't have much to day about this unit other than it works. A Turbo Timer is a Turbo Timer as long as it works. Other than the colors and the looks of it, there really is not much differences. Of course there is the different variations of time you can set it too. There was a option for me to by a RX-7 Wiring Harness to plug it right in, but I ended up hard wiring it.