Whether you live in the country or in an urban area, wild mice and rats can be dangerous pests in your home. Repel these rodents humanely with the Ultrasonic Pest Repellent w/Night Light. This three-pack of electronic pest controllers will effectively repel rodents from three rooms of your home. Each repellent has a built-in night light.Smarter and More Humane Than Traditional Mice or Rat Traps Designed specifically for small rooms, the Ultrasonic Pest Repellent plugs in to any outlet to provide effective temporary relief from rats and mice. You won't need to deal with the cleanup required of traps or poisons, and these electronic pest control devices won't affect electronic appliances, such as computers or televisions.