1. [Ultrasonic insect control technology] : electronic insect repellent works by ultrasonic. Ultrasonic waves stimulate the brain and auditory nervous system of pests, driving pests, mice, rodents, and mosquitoes away from your home. 2. [Quiet and noiseless] : The ultrasonic sound emitted by insect repellent is far beyond the range of human hearing. There is no need to worry about the noise, so that you and your family can have a good sleep 3. [Child and pet safety] : Ultrasonic rodent-repellent physically destroys the living environment of pests and only affects pests and mice. Free of poisons, odors and chemicals, it is very safe for children, pregnant women and pets. 4. [Easy to use] : Just plug our ultrasonic insect repellent into the socket, the blue light means he is working, and it can also be used as a night light. Make sure there are no obstructions such as curtains or cupboards in front of the repellent. Note: Our ultrasonic repellents take 3 or 4 weeks to see noticeable results 5. [Wide application] : Each device can effectively cover and control the area of 800~1200 square feet. Since ultrasonic waves cannot penetrate walls and solid objects, it is recommended to place one in each room. Ultrasonic repellents can be used in bedrooms, garages, kitchens, offices, warehouses, flour mills, food processing plants, furniture stores and other places where bait or insecticides cannot be used.