INTRODUCING POOP STOPPERS
Poop Stoppers, stopping your neighbors dog from pooping in your yard is a motion sensored ultrasonic animal invasion system that is designed to emit a frequency of 67Hz+. Once movement is detected the frequency pitch of 67Hz+ will emit sound. These tranceivers work on a principle similar to radar.
The Poop Stoppers System is safe and non harmful to animals, children and all humans. In sound we hear frequency as pitch and the Hz = cycles per second. Named after Heinrich Hertz, the first to prove the existence of electromagnetic waves.