1. [Ultrasonic insect repellent] The insect repellent sends out ultrasonic waves of 22-65 KHZ frequency through dual ultrasonic and electromagnetic chips, which can interfere with the brain and auditory nervous system of pests, and keep your home away from pests, mice, rodents and mosquitoes. 2. [Wide coverage] Ultrasonic coverage area can reach 800-1200 square feet. Since ultrasound waves cannot penetrate walls and solid objects, it is recommended to install one in every room. For larger rooms like warehouses, two or more repellents are needed. 3. This insect repellent works 24 hours a day, 7 days a week. Insect repellent should be installed at a distance of 80-120cm from the ground, perpendicular to the ground. The height will achieve the best results, and the best results will be seen after 3-4 weeks of continuous use. 4. [Environmentally friendly and easy to use] You just need to plug the drive into a standard wall socket to start working, no batteries, save you a lot of money, and no sound, no chemicals, no poison and no smell. 5. [Widely used] Insect repellent, widely used indoors to drive away mice, insects, bedbugs, fleas, rodents, cockroaches, mosquitoes, ants, spiders, mice, fruit flies and other insects and rodents, ultrasonic make them quickly leave your home