Got to do more reading... click around the site. There is so much info on his site you could be there all day.
Here's some more info on the iED
http://www.nightrider.com/parts/ied_faq.htm
http://www.nightrider.com/parts/ied_product_line.htm
Some info on the HD high heat
http://www.nightrider.com/parts/hd2007hd_heat_00.htm
As I said about other tech related info
Right side menu...
http://www.nightrider.com/biketech/
Examples which all include links inside them if you want to be educated more:
motor oil
http://www.nightrider.com/biketech/oilinfo0.htm
Spark plugs
http://www.nightrider.com/biketech/hdsparkplugs.htm