PEOPLE AND PET FRIENDLY: This ultrasonic repellent is completely safe for people and pets. It has a good destructive effect on rats, cockroaches, spiders, mosquitoes, insects, mice, rodents, flies, ants, fleas and other pests.High-tech: Based on the defense principle of physical pests, using the latest dual-chip, this mouse repellent emits ultrasonic waves of different frequencies to stimulate the nervous systems of insects and mice, making them feel uncomfortable and gradually escape. Intermittent changes in ultrasound frequencies prevent them from developing immunity and adaptation.Easy to use: Just plug the electronic ultrasonic repellent into the insect repellent socket, when you see the blue night light on, it will start repelling the pests. Gives you a sense of security when you sleep on a dark night. Lightweight andwidely used: Ultrasonic insect repellent is easy to carry,easy to install, plug and play. Widely used in homes, warehouses, offices, hotels, etc. Energy efficient, no batteries required, saving a lot of money.Large coverage: The effective coverage area of each pest control can reach 20-50 square meters.It is recommended to install this repeller in a vertical position 20-80 cm from the ground. For best results, you should equip every room with an insect repellent.