Helps repel household pests by emitting waves of constantly changing ultrasonic signals that pests have a difficult time adapting to. RoyalŪ Pest Repellers are safe to use around your family and any non-rodent pets like cats, dogs, birds and reptiles. Ultrasonic sound will lose intensity as it travels and is absorbed by soft objects such as carpeting. It is also reflected by hard surfaces, such as furniture and cannot reach nesting and feeding places behind walls, under floors, or within cracks. For larger rooms multiple units may be necessary. In some cases, over time, certain rodents may become conditioned to ultrasonic sound and may return to their feeding or nesting areas even in the presence of an ultrasonic product.
Customer Review: A piece of that "number 2" stuff
works about as well as an ice cube would in cooling down an oven set at 400 degrees. Better to give your money to a charity than to buy this crud.
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