Electronic Insect and Pest Control (electric)Ultra-sonic technology Simply plug in to any outlet, safely drives away Mice, Spicers, Fleas, and most insects. I personally have these in my home and have not seen a wasp or ant in my house (two insects I had a problem with before). Completely Safe No poisons, No harm to infants or pets. A humane way to drive away rodents and insects. How It Works Works through altrasound technology, you and I can't here it but, sounds like a jackhammer to pests. Our patented technology outperforms competitors products by offering the largest tested coverage areas, scientifically researched sound patterns, and a satisfaction guarantee. One unit covers 750 Square Feet. Each unit has a built-in AC outlet. GET ONE FOR EVERY ROOM IN YOUR HOUSE.