4 Pack Ultrasonic Mice And Rat Repellent, Pest And Spider Repellent For Mosquitoes, Flies, Cockroaches, Rats 2023 The latest ultrasonic technology adopts the intelligent dual chip design. The ultrasonic insect repellent stimulates the auditory nerve through ultrasonic in the frequency range of 20kHz to 65kHz, and destroys the central olfactory and nervous system pests and rodents. This ultrasound will make mice, spiders, flies, fleas, ants and other types of rodents and insects very uncomfortable, driving them out of our homes and habitats. It is environmentally friendly and harmless to human beings. This pest control method uses ultrasonic waves to drive away pests. However, these ultrasonic waves are invisible and harmless to humans and pets. The electronic mosquito repellent can emit non-toxic ultrasound without radiation. Ultrasonic protective agent is 100% safe, environmentally friendly and low consumption. The working area of the ultrasonic protective agent is 80-120 square meters, but the ultrasonic will not penetrate the wall. We recommend using at least one device per room. Ultrasonic insect repellent is an ideal choice for families, offices, garages, attics, basements, warehouses and greenhouses. Easy to use, just plug the insect killer into the power socket (at least 12 inches from the ground). This pest killer can be used in any household with power supply, such as kitchen, bedroom, basement, garage, warehouse, etc.