Ultrasonic protective agent with intelligent double chip design destroys the central olfactory and nervous system of pests and rodents. This type of ultrasound can make rats, spiders, flies, fleas, ants, and other types of rodents and insects very uncomfortable, driving them out of our homes and habitats. < p>No chemicals, non-toxic, odorless, silent and radiation-free. Ultrasonic waves and transmitted electromagnetic waves have no effect on pregnant women, children and pets, ultrasonic sound is inaudible to humans and pets. It hunts pests and rats without killing them, leaving dead insects or nasty rodents behind. floor. The ultrasounds are inaudible. Install a repellent in each room. Please note that ultrasonic waves cannot pass through walls. Although our pest repeller works well, if you have a large infestation we recommend placing our insect repellent in each room. Wide effective coverage area: The ultrasonic repeller is effective for an area of up to 120 m. Pest control is widely used in homes, warehouses, offices, gardens, hotels, basements. Using ultrasound to get rid of pests is a process that will probably take about 3-4 weeks to show clearly the effect. Please be patient at first.