【Ultrasonic Pest Repeller】GBARAN ultrasonic pest repeller adopts ultrasonic automatic frequency conversion technology to emit 20~55KHZ ultrasonic waves, to stimulate the hearing and nervous systems of mosquitoes, cockroaches, mice, mites and other pests to effectively keep pests away from your home. 【Safe for Humans and Pets】The mouse repellent ultrasonic frequency is 20~55KHZ, and the human ear cannot hear the frequency higher than 20KHZ. As long as the repeller is not placed in the hearing-sensitive area of cats and dogs, it will not cause any harm to your pet. 【Wide Coverage Insect Repellent】This rat repellent can effectively prevent an indoor area of up to 80-120 square meters of pests, can be widely used in homes, warehouses, offices, supermarkets, hotels, etc. We recommend installing one for each room because ultrasonic waves cannot penetrate through walls and solid objects. 【Plug-And-Play】Simply plug in our spider repellent. It works when you notice the foggy glow. This rat