An ultrasonic pest repeller is an electronic device that uses sound waves of high frequency to keep away cockroaches, spiders, and rodents. The high-pitched sound interferes with the neurologic system of these organisms subjecting them to physical discomfort. It's a creative way to keep away these pests without killing them. After all, you don't want the nuisance of dead mice and cockroaches in your backyard, do you?
There are no side effects to humans or pets while using ultrasonic pest repeller.