1. Ultrasonic insect repellent, quiet and effective in repelling pests - If you are considering non-chemical methods of repelling pests, we recommend an ultrasonic insect repellent, a device that emits a continuous noise at a frequency too high for humans to hear. These Sonic waves are designed to repel, harass and deter common household pests such as cockroaches, spiders, mosquitos, ants and rodents. The intelligent multi-frequency ultrasonic frequency conversion system makes pests have nowhere to hide. 2. Keep Your Family Healthy and Safe - Many people are naturally concerned about the safety of their pets when using insect repellants. While cats and dogs can hear sound waves, humans and household pets cannot hear ultrasound, the study found. So you can rest assured that this repellent won't affect your family and pets, 3. How to use the ultrasonic insect repellent at home - the insect repellent is easy to use. All you have to do is plug the insect repellent ultrasonic into an electrical outlet. When the blue night light is on, it starts repelling bugs. Repellents should be placed out of the way of walls and furniture. It is recommended to install this repellent between 30-50 inches from the ground (for flying pests) and 10-30 inches from the ground (for crawling pests). 4. 360-degree protection of your home without dead ends - the effective coverage of each pest control can reach up to 1400 square feet. Because ultrasonic waves cannot penetrate walls and solid objects, it is recommended to use a one-room-one-unit. 360 degree protection for your home. 5. Depending on the severity of the pest, typical results may take 1-2 weeks. In most cases, the effect of electronic insect repellent can be seen within 3-4 weeks, then we can say goodbye to pests and mice~ Products from LUOLV's store