【Ultrasonic Pest Repeller】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 effectively keep pests away from your home. 【Insect Repeller Safe for Humans and Pets】The ultrasonic mouse repellent frequency is 20~55KHZ, and the human ear cannot hear the frequency above 20KHZ. As long as the repellent is not placed in the sensitive hearing area of cats and dogs, it will cause no harm to your pet. 【Wide Coverage Insect Repellent】This rodent repellent can effectively prevent indoor area up to 80-120 square meters of pests, can be widely used in homes, offices, hotels, etc. We recommend that you install one for each room because the waves. 【Plug-and-Play Anti-Rats】Just plug in our pest repeller, it works when you notice the misty glow. This rat repeller should be installed 10-30 inches from the ground and no