Rodents cause widespread damage and destruction to homes & commercial spaces. Since rats and mice are more active during the night, it becomes increasingly difficult to control their infestations. Ultrasonic Rat Repellent Machines for rodent control services are compact, safe and technically advanced devices that emit high-frequency (20 KHz to 50 KHz) ultrasonic sound waves that can drive out rodents from your living spaces, and prevent new ones from entering your home, office or car.