Yard and Garden Protector deters unwanted animals safely and humanely. It broadcasts a high-pitched sound (not audible to people) to ward off pests like rodents, skunks, raccoons, deer and bears. It has two settings: continuous broadcast or motion detector, which plays sound and flashes an LED light to startle animals moving in its 15' range. Sound covers up to 2000 sq. ft. Can be wall mounted. Uses 4 C batteries (not included). 4 1/2" w x 7" h x 3 3/4" d.