Upgraded Ultrasonic Technology - Our Ultrasonic Pest Repeller Adopts Dual-Chip Ultrasonic Technology, This Mouse Repellent Emits Different Frequencies of Ultrasonic Wave to Irritate Nervous System of Insects and Rats, Making Them Feel UnComfortable and Flee Away Gradually. Intermittent Changes In Ultrasound Frequency Prevents Them From Developing Immunity and Adaptability. (Not Suitable For Households with Rodent Pets Like Hamsters.) . Child & Pet Friendly - The Ultrasonic Pest Repellent Is Completely Safe For Children and Pets, They Are No Chemicals, No Poisons, No Insecticide, No Traps, No Kill. The Frequency of The Sound Is Only Harmful to Pests Such As Mice, Spiders, Mosquitoes, Ants, Snakes, Rats and More. It Is A Physical Method That Removes Pests, Is Non-toxic, and Environmentally Friendly. It Is An Insect Repellent That Combines Advanced Technology and Humanitarianism. . Lightweight Design - The Ultrasonic Pest Repeller Is Portable and Easy to Install, Just Plug The Ultrasonic Pest Control Repellent Into A Power Outlet, Press The Switch, Fully Automatic Intelligent Ultrasonic Frequency Conversion to Destroy The Pest Living Space.Widely Used In Home, Warehouse, office, Garden, Hotel, Etc. Energy Saving, Keeps You Safe From Pest Intrusion All Day Long without Worrying Your Bill. . Larger Coverage - The Effective Coverage of Each Pest Control Is Up to 1600 Square Feet. It Is Recommended to Install This Pest Repeller Vertically From 32-47 Inches Away From The Ground. For A Best Result, We Recommend to Install One Unit Per Room As The Ultrasound Cannot Penetrate Through Walls & Solid Objects. . Ultrasonic Pest Repeller - The Ultrasonic Pest Repellent Usually Takes 3-4 Weeks For A Different Result Depending On The Amount of Infestation. .