The Attack Wave PestrepellerTM is a user friendly and environmentally friendly way to combat rodents. This device utilizes automatic wave variation, minimizing the chance that pests become immune to the sound. It attacks the auditory and nervous systems of rodents. This pressure causes them to abandon their food sources and shelters. Does not harm dogs and cats, but should not be used in the presence of hamsters, guinea pigs, gerbils or other rodent pets.