【Effective Ultrasonic Insect Repeller】Intelligent multi-frequency ultrasonic conversion systems make pests nowhere to hide. Stimulate the brain neurons of roach, spiders, mosquitoes, ants and rodents with 60 segments/second of changing ultrasonic waves, making them extremely uncomfortable and unable to adapt. Long term stimulation can cause damage to the neurons of pests, thereby achieving the goal of distracting and expelling common household pests effectively. 【Your Family In A Quiet And Friendly Way】Many people are naturally worried about the safety of their pets when using an insect repellents device. But ultrasound is inaudible to humans and household pets. The ultrasonic insect repeller is harmless and friendly to children, pregnant women and pets. This Indoor Pest Repellent effectively repels most pests and rodents like rats, bats, mosquitoes, roaches, ants and spiders. 【Plug and Repel】Pest repellents are simple to use. Its power is only about 5 W, without the need for batteries, plug in and use, truly achieving energy saving and money saving. The repeller should be placed in a location where its noise will not be affected by walls and furniture. It is recommended to install this pest repeller between 30-50 inches away from the floor for flying pests and 10-30 inches from the ground for crawling pests. 【24-hour and 360° All-round Expulsion】The powerful ultrasonic waves can cover up to 160 square meters/1722 ft². We recommend you to install one for each room. But for areas with serious Vermin, we suggest install 2 or more devices for other room. It's widely used in homes, warehouses, offices, restaurants, supermarkets, hospitals, granary, etc. It can more effectively deal with various types of pests and keep your family away from pest infestation. 【Say Goodbye To Pests!】Harness power of ultrasound easy to deter mouse, rats, bedbugs, mosquitoes, roaches, ants, fruit flies, spiders and silverfish, enjoy a pest-free life. Mostly can see the electronic pest repeller results within 3-4 weeks! The exact time depends on the severity of the pest infestation. TIPS: To keep the pest from coming back continued use is recommended. If you have any questions about our products, please feel free to contact us at any time.