1. Keep pests away quietly and effectively. If you're considering non-chemical methods to keep pests away, we recommend an ultrasonic insect repellent as a device that makes a constant noise at a frequency too high for humans to hear. These sound waves are designed to disperse, harass and deter common household pests such as cockroaches, spiders, mosquitoes, ants and rodents. The intelligent multi-frequency ultrasonic conversion system makes it impossible for pests to hide. 2. Protect your family in a healthy and peaceful way. Many people are naturally concerned about the safety of their pets when using insect repellents. While cats and dogs can hear sound waves, humans and household pets can't hear ultrasound, the study found. Free of poisons, odors and chemicals, it is safe and harmless for children, pregnant women and pets. 3. How to Use Ultrasonic insect repellent at home - Insect repellent is simple to apply. All you have to do is plug the insect repellent ultrasound into an electrical outlet, and when the blue nightlight comes on, it will start repelling the pests. Insect repellents should be placed where their noise is not affected by walls and furniture. Flying pests are recommended to be installed 30 to 50 inches from the ground and crawling pests 10 to 30 inches from the ground. 4. Effective coverage of 1,600 square feet per pest control. 360-degree protection of your home, no dead zones. Widely used in homes, warehouses, offices, restaurants, supermarkets, hospitals, granaries, etc. 5. You can buy it for relatives, friends, colleagues, parents, it is a great gift.