This is the patented pest deterrent that offers an easy, safe, environmentally responsible alternative to chemical insecticides and inhumane traps. Simply plug the unit into an AC outlet; using the electric wiring in your home, the device generates electromagnetic waves that disrupt the nervous system of bugs and rodents residing in walls and ceilings. At the same time, it emits ultrasonic sound to drive away pests within your living space. Harmless to humans and most domestic pets, the deterrent effectively repels ants, roaches, spiders, mice, rats, and other pests, with results usually seen after four weeks. The deterrent won't interfere with other electrical equipment and draws as little power as a 40-watt bulb. It has a test function, a built-in nightlight, and LED indicators that show modes of operation. It protects a 2500' sq. area. 5 1/2" H x 3 1/2" W x 1" D. (1 1/2 lbs.)