The Bird-X Transonic Animal Repeller repels pests by using “psychoacoustic jamming" with intense, variable pitch, ultrasonic and sonic sound waves. Keeps small animals, including raccoons, skunks, squirrels, bats, rats and mice as well as spiders, fleas, ticks and other flying and crawling insects away. Frequency: 3-40 kHz, 96 dB at 1/2m. Includes AC adapter with cord.