Our Ultrasonic Rat & Rodent Repellents spread Ultrasonic sound waves which cannot be heard by humans but give the frightening scream of death to the Rats & Rodents and affect their nervous system. The sound frequency level heard by Rats & Rodents are different from the humans, so the system simply operate on this basis.
The frequency generated by the Rat&Rodent Repellent equipments automaticaly change within a wide range of different frequencies so that the Rats can not get used to it not likely to some of alike products of its category.
