Rid your home of mice, rats, ants, spiders, bedbugs, etc. with this set of 4 Ultrasonic Pest Repellers from Royal. Each unit is a very compact and non-invasive way of keeping rodents and insects away from areas in your home or office. Studies suggest that animals have more sensitive hearing systems than humans. According to Darwin these extended capacities are crucial to survival. Scientists have determined that certain ultrasonic frequencies (beyond human hearing) can irritate certain insects and rodents. These units emit frequencies to silently keep unwanted creatures away. Simply plug each device into any 110-Volt AC outlet and ultrasonic waves are automatically emitted. Doubles as a night light. Silent operation - does not effect human hearing. Safe for use with household pets. Uses no chemicals or harmful pathogens. Each unit can adequately cover a 12x18 room. Can penetrate through most walls to break-up hidden nests
