They are voltage / amperage reducing items that run motors more efficiently, with the intent of using less electricity, saving money on your electric bill, and producing less motor heat, thereby increasing motor life.
Patented and developed by a NASA scientist. In use since the mid-to-late 90s. Website displays some usage results and letters of recommendation.
If you are unsure of what I am speaking of, visit www.energysmart.com
I would like to hear some opinions from electrical experts or first-hand use as to whether they would be worth the money if they perform as claimed.