The syncro spark module is a little circuit about 1 inch square...It uses surface mount technology...It is connected in series with a standard ignition circuit (anybody's) to electronically control the timing according to the rpm of the engine...It has been available for years, and C&H was the first to use it..It works VERY well...A timing light pointed at the prop makes the prop look like it's stationary at ANY rpm, there is NO fluctuation...There are other ignitions now that have other features, but none work any better than one with syncro spark..Making a big deal out of omitting 20(?) parts is ridiculous, it's been available for years, to anyone wants to pay the price...And the price WILL be higher...Bill has been selling syncro spark modules for a long time, I think for $39.95....