1.Ultrasonic protection agent with intelligent double chip design destroys the central olfactory and nervous system of pests and rodents.2.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.3.No chemicals, non-toxic, odorless, quiet 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 chases away pests and rats without killing them, leaving behind dead insects or nasty rodents. 4.Easy to use: Plug the devices into power outlets at a height of 10 to 40cm from the ground.Ultrasounds are inaudible.Install a repellent in every room.Please note that ultrasonic waves cannot pass through walls.Although our pest repellent works well, if you have a large infestation we recommend placing our insect repellent in every room.Wide Effective Coverage Area: The ultrasonic pest repellent is effective for an area of up to 120 m.5.Pest control is widely used in homes, warehouses, offices, gardens, hotels, cellars.Using ultrasound to get rid of parasites is a process that will likely take around 3 to 4 weeks to clearly show the effect.Please be patient at first.