Ultrasonic TechnologyUltrasonic Pest Repeller adopts both ultrasonic and electromagnetic chip dual technology, which can disturb the hearing and nervous system of the pests, so as to repel the pests quickly and powerfully. It can repel mosquitoes, spiders, bedbugs, cockroaches, rats, fleas, ants, fruit flies and most other flying and crawling pests. Wide CoverageUltrasonic pest repeller is widely used in homes, warehouses, offices, gardens, hotels and other places. Since ultrasonic waves cannot penetrate walls and solid objects, it is recommended to put one in a room. For areas with serious pests, it is recommended to install 2 or more units. EASY TO USE, PLUG AND PLAYSimply plug the Pest Control Mosquito Repeller into an outlet. Please make sure to install it vertically. And make sure there are no obstacles such as curtains or cabinets in front of the repellent. Most customers can see the effect in 2-3 weeks! SAFETY & ENVIRONMENTALLY FRIENDLYNo need to use poisons, traps and insecticides as the insect repellent is 100% safe and harmless to humans, children and pets. Repel pests in a non-toxic and environmentally friendly way. Widely UsedThis product is easy to carry, easy to install, plug and play. Widely used in homes, warehouses, offices, gardens, hotels and other places. Energy saving, keep you free from pest invasion around the clock, no need to worry about bills.