Lenteks PestContro II is a new product in our line of award-winning electronic pest control products. Plug into an AC outlet and our MagnetoSonic technology goes to work. This technology works within the walls and wiring of your home creating a very unfriendly place for pests. Sweeping Sound Ultrasonic Technology works within the living areas of the home creating a constant change in the audio frequency preventing the pest from becoming accustomed to the sounds The PestContro II transmits an ultrasonic sound using "Sweep Sound Technology" that fluctuates patterns of sound unheard by humans and pets, but extremely irritating to pests. (Equipped with an optional switch to disable ultrasonic waves which may disturb hamsters or gerbils.) FEATURES Designed to repel: ants, mice, rats, cockroaches, uirrels, bats, fleas, crickets, spiders, bees,waterbugs,and flies. Effective coverage 2500 sq. ft. Uses MagnetoSonic Technology Winner of the Smithfield Innovation Award Tested and Approved by the National Home and Gardening Club Over 1,000,000 units sold CE Approved Two year warranty