Pest A Cator Ultrasonic & Electromagnetic Pest Repellent combines two advanced technologies to help you control unwanted pests effectively. Utilizing ultrasonic technology, it emits a pulsating signal that targets rodents and roaches, while its patented electromagnetic technology sends a pulsating signal through your home’s wiring, reaching various structures. This easy-to-use device plugs directly into any standard 110-volt outlet and is safe to use around children and most household pets, with the exception of hamsters, gerbils, and other rodent pets. Designed to cover approximately 2,000 square feet, it a convenient and chemical- solution to help keep your living spaces pest-.