Plug-In Pest Free® is the ONLY Chemical Free, Toxin Free, Environment Friendly Electromagnetic Pest Control Device to be scientifically tested and proven in a leading Australian University to be effective against Rats & Mice. Plug-In Pest Free®works by emitting electromagnetic frequencies which can penetrate through walls to cover your entire home / business but is 100% Non-toxic and proven to be absolutely safe for humans, children, pets, electronic equipment and computers. Just Plug In Pest Free® in any power point and Forget about it. It works 24/7 silently and effectively to keeps away Rats, Mice and Cockroaches providing you and your family a healthy, clean and safe environment at home or at work.