They emit intensive sound at high audible and painful to pests but inaudible to humans. The pests will usually leave the area being protected by the ultrasound.They do not get killed.
The powerful sound waves generated by the transducers of RSCAT Repellents are within the hearing range of many pests and cause them pain and discomfort.
Sometimes they will leave the area being protected immediately, in other cases it will take as long as two to three weeks before significant reduction in infestation occurs.
RSCAT transducers are completely quiet. If you cannot hear do not thing that the unit is not working. You cannot hear ultrasound.
