The Pest-Stop Ultrasonic All Pest Repeller emits three frequencies undetectable to humans. Repels rodents, dogs, cats, rabbits, squirrels, badgers and foxes. Works on a looped cycle or infrared motion sensor. Can be wall mounted, comes with a ground spike for flexible positioning. Range 15 meters (117m) with 60 of rotation Requires 2 x 9V (not included)