Pest-A-Cator 1000 Electronic Rodent Repeller. It protects an entire area of approximately 1,000 sq. ft. and is safe around children and household pets. Tested in public housing facilities and by the U.S. Navy, this device plugs into any 110v outlet and is useful for smaller homes, condominiums, apartments, mobile homes, and more. Its patented pulse (electro-magnetic) technology sends a pulsing signal throughout the wiring of your home, annoying rodents and helping with problems behind walls, floors, and ceilings.