The story of the Power Pet Door begins in 1986 when, as a young company, in our effort to find a better way to fight fleas, we introduced the now famous, Electronic Flea Collar. This device, developed by our brilliant, if not a little wacky, electronics engineer, turned out to be the smallest ultrasonic transmitter on Earth for its power range. After manufacturing millions of these tiny ultrasound emitting collars, it dawned on us that the product may have other applications besides driving fleas crazy. We began developing several pet operated devices that used the "flea collar" as a pet worn transmitter. The Power Pet Door was one of our first ideas.