1. [Wide and effective coverage] : Full range of ultrasonic emission, effective coverage control area of 1600 square feet. Because ultrasonic waves cannot penetrate walls and solid objects, it is recommended to use a chamber by chamber. Widely used in homes, supermarkets, warehouses, restaurants, offices, gardens, hotels and other places. 2. [Comprehensive protection] Insect repellent can effectively repel mice, cockroaches, mosquitoes, spiders, bedbugs, wasps and most household pests. You don't need to buy different products for different kinds of pests. It requires no batteries and costs little power. 3. Depending on the severity of the infestation, typical results may take 1-2 weeks. It is normal for pests to increase in number during the initial period of use, as they leave their living areas after being attacked by ultrasound waves. Most people can see results within 3-4 weeks. 4. [Friendly to pets, humans and the environment] Non-toxic, no odor, no chemicals, obviously safe for children, pregnant women and pets. Humans and household pets cannot hear ultrasound. 5. The rat repellent plug-in is used as a sleep light, which starts working when the blue LED light is turned on and drives pests away from walls, floors, basements and attics. Ultrasonic exterminator adopts physical extermination method, no noise, no odor, no radiation.