[Safe and User Friendly] Ultrasonic Pest Repeller is a home use product that works 24 hours a day, 365 days a year and does not contain any hazardous chemicals that are poisonous, poisonous, or produce noxious odors. Ultrasonic frequency cannot be heard by humans or animals and is completely harmless and safe for pets and children. [Latest Ultrasonic Technology] With intelligent dual-chip design, the repeller d& #39;ultrasonic insect repeller stimulates the auditory nerve with ultrasonic in the frequency range of 20kHz-65kHz and destroys the central olfactory and nervous system of pests and rodents.This ultrasonic repeller can effectively repel mice, mosquitoes , spiders, insects, ants, flies, cockroaches, fleas and other pests in your home. [Large Effective Range] Each pest repeller has an effective range of up to 1,600 square feet. It is recommended that this ultrasonic insect repellent be installed vertically 10-32 inches from the floor, and having an ultrasonic insect repellent in