Using the latest ultrasonic insect repellent technology, each plug-in repellent uses sound waves to disrupt the central nervous system, and pests, mice, spiders, fleas, cockroaches, bed bugs and mosquitoes have nowhere to hide and will be effectively expelled. This insect repellent has an effective area of ​​up to 120 square meters. Note that ultrasonic waves cannot pass through walls and solid objects. It is recommended to install an insect repellent in the room. It works by plugging the repellent into an outlet and the breathing light begins to flash. With this repellent, the pests will be repelled and repelled within 3-4 weeks. Make sure there is no cover in front of the repeller, such as curtains or cabinets, for perfect results. Only pests can hear this repeller ultrasonic. Humans and pets will not be affected, and pregnant women and children will not be harmed. But be careful if you have hamsters in your home as pets. Note that it usually takes 3-4 weeks to see results, depending on the degree of infection. You can try this ultrasonic rat repellent risk-free. Features: Give your kids a home and a safe workplaces. This repellent is the natural enemy of most pests, such as: mice, cockroaches, mosquitoes, ants, etc. Suitable both indoors and outdoors. Designed for lofts. This repellent uses the latest frequency technology. The ultrasonic waves it emits help attack the nervous system of insects, quickly driving them out of the house. Product Benefits: </p > Non-toxic, chemical-free, safe for your family and pets.