Sonic pest repeller keeps unwanted birds off your newly-seeded lawn, and small, destructive animals at bay! Automatically senses movement up to 30 feet away and emits a continuous ultrasonic tone causing birds and critters to fly and flee! Scares off crows, deer, raccoons, possums, rodents and bats. Just set dial to specific pest, and the repeller does the rest! Uses 9V AC adapter (included). 5-1/2" H with 19-1/2 foot cord.