Upgraded pest control technology: This rodent repellent emits ultrasonic waves of different frequencies to stimulate the nervous system of insects and mice, making them feel uncomfortable and gradually escape. [Safety and environmental protection] Non-toxic and harmless, physically repellent, 100% safe, harmless to humans, children, and pets. Lightweight design: Ultrasonic insect repellent is portable and easy to install, plug and play. Widely used in homes, warehouses, offices, gardens, hotels, etc., energy saving allows you to protect you from pests all day without worrying about bills. Easy to operate and full coverage: just plug the insect repellent into a wall socket 31 to 47 inches from the floor and make it perpendicular to the ground. It works when the blue LED night light is on. For best results, equip each room with an insect repellent. It can only be used indoors. Continuous process of repelling pests 3-5 days: run aimlessly Week 1-2: Better Mosquito Control Week 3-4: Automatic migration Please be patient, it takes 3-4 weeks for the ultrasonic insect repellent to take effect. And it is recommended that you continue to use the effect will be better. Easy installation Just plug the electronic pest control ultrasonic insect repellent into the power socket and use it. The blue LED lights up, indicating that the device is working. Quiet night Ultrasonic insect repellent uses noise reduction technology to continuously provide you with protection in a quiet environment. Does not affect your sleep. Large coverage area The effective area is 800-1200 square feet (80-120 square meters). Please note that ultrasound cannot pass through walls. But for areas with severe pests, you can install 2 or more devices in other rooms.