This low-profile electronic pest repeller uses quiet ultrasonic sounds to evict Mice, Bats, Spiders, cockroaches and Crawling Insects. Works well in your Kitchen, Garage, Basement, Workshop, Shed or Attic. The Transonic PRO is a cost-effective, easy solution to your pest problem. Independent laboratory and university testing has proven ultrasonic and sonic sound technologies to be effective forms of pest deterrents. Pests are repelled away from your Transonic Pro unit because they cannot adapt to the constantly changing array of ultrasonic and sonic signals emitted by the device. The unit disrupts the pests habitat, effecting their feeding and communication habits, forcing them to leave the area. The unit is safe for use around humans, children, and pets such as dogs, cats, birds, and reptiles.