Yard Guard - Electric Barrier For PestsHumanely keep pesky animals out of your yard without poisons or traps. Sonar Barrier with Ultrasonic high frequency, (silent to most humans) irritate & annoy common yard pests, making them to seek calmer, untreated areas. Repels dogs, cats, raccoons, skunks, squirrels, bats, rats, mice, field mice, deer, bears and some insects. Easy to operate can be set to either constant or motion activated. Water & weather resistant, protects up to 1300 m (4000 sq