High frequency: Plays an ultrasonic, high-pitched frequency to make it uncomfortable for animals to be near. Pest Control: Get one or two ultrasonic pest repellers! Motion sensor: With a large motion sensor that covers a 110-degree arc, up to 26ft away. Use:Can repel cats, and be used as an effective deterrent for dogs, squirrels, rats and more. Weatherproof Fully waterproof, and designed to be left out in any weather. Easy-installation: Simply fix in place using the ground stake or screw onto a wall! Ultrasonic Pest Repeller | Living Social