Why deal with having to dispose of dead mice caught in ordinary traps? This keeps the mice from wanting to stay in your nice food-filled home! The Victor Mini PestChaser emits high frequency sound waves that effectively repel rodents from protected areas. For use in average-sized rooms, kitchens, garages, attics and basements. The sound is completely inaudible to people and non-rodent pets. Varying intensity and frequencies of ultrasonic sound waves prevents rodents from getting used to the Victor Mini PestChaser. Since the sound is inaudible, a red LED light tells you the unit is working properly. It's kinder than traps, safer than poisons, and there are no dead rodents to dispose of so it minimizes human contact with mice, rats, and other disease-bearing rodents. Reduction in rodent activity should occur within 6-10 days. Estimated service life of the unit is 5-7 years or more. Note: Ultrasonic sound cannot penetrate furniture, cabinets or walls. Multiple units required for multiple rooms.