【Intelligent Frequency Conversion】JUCHENG ultrasonic pest repeller adopts automatic frequency conversion ultrasonic technology to emit 20~55KHZ ultrasonic waves, to stimulate the auditory and nervous systems of mosquitoes, cockroaches, mice, mites and other pests to keep pests away from your home effectively. 【Insect Repeller Safe for Humans and Pets】The mouse repellent ultrasonic frequency is 20~ 55KHZ, and the human ear cannot hear the frequency above 20KHZ. As long as the repellent is not placed in the hearing-sensitive area of cats and dogs, it will not cause any harm to your pet. 【Wide Coverage Insect Repeller】This repellent against rodents can effectively prevent indoor area up to 80-120 square meters of pests, can be widely used in homes, warehouses, offices, supermarkets, hotels, etc. But for areas with serious vermin, we suggest installing 2 or more. 【Plug-and-Play Anti-Rats】Just plug in our pest repeller, it works when you notice the misty glow. This rat repeller should be