Ultrasonic Insecticide: Ultrasound passes through walls or obstacles, the effect will be weakened. Our electronic mosquito repellent is equipped with a super powerful ultrasonic speaker, which can greatly increase its penetration and make it more powerful, which can effectively kill hemostatic drugs. Multi-function: the device of ultrasonic pest control can resolve pests in one stop. It is very suitable for repelling rodents, mice, mosquitoes, spiders, cockroaches, fleas, ticks, flies, ants and many other pests. Safety and health: does not contain chemicals and noise and will not be detected by the human ear, so it will not interfere or irritate people, dogs and cats. The ultrasonic pest control device is chemical free, non-toxic and 100% safe for humans and pets. Safe for Humans/Pets - By destroying the living environment of pests in a physical way, ultrasonic waves only have an effect on pests and mice. For children / pregnant women / the elderly / pets. This insect repellent is quiet, non-toxic, chemical-free and odorless, and non-radioactive. Don't worry about damage to you and your family. The ultrasonic repeller produces effects in an area of up to 80~120 square meters. Since ultrasound cannot penetrate walls and other solid objects, we recommend a unit for each room. Even in the case of large warehouses subject to frequent infestations, several units are necessary