The Vanish Stealthwave Turbo Pest Repeller is an effective & environmentally friendly way to combat rodents without visitors knowing you have a rodent problem. The device produces a strong sound pressure in the air, attacking the auditory and nervous systems of mice & rats, which causes them to abandon their food sources and shelters. It also utilizes automatic wave variation, minimizing the chance that pests become immune to the sound. The ultrasonic sounds continuously penetrate up to 5,000 unobstructed square feet to chase away the rodents effectively.