Riddex Pest Guard Pest Repellant Banish rodents, birds, strays, and more without traps or poisons! Water-resistant* repeller uses ultra-sonic sound waves that only pests can hear to help keep them off your property. Features motion-activated dusk-to-dawn sensor, automatic & manual modes, as well as frequency & range controls. Keyhole drilled for mounting on wall or fence. Covers 900 sq. 6" x 4.25" x 3". Uses included UL®-listed AC adapter, or 6 AA batteries, not included. *Not waterproof. Use in covered area and do not submerge unit in water. 110 volts