1/3/6PCS New Ultrasonic Pest Repeller US/UK/EU Anti Rodent Mice Cockroach Rat Spider Insect Plug Mosquito Killer Electronic Description: [Upgraded Ultrasonic Technology] Made with newest chip to enhance the intensity of ultrasonic wave, which can be more effectively to make pests and rodents are harder to immunize than before. Ultrasonic can disturb and irritate the nervous system of pests which make them unpleasant and uncomfortable. Ultimately drives them away from your home. Work well on mosquitoes, mouse, cockroach, spiders, ants, flies, bedbugs, fleas and more other pests._x000D_ [Eco-Friendly and Safe Design] The pest repellent is safe and environment-friendly, 100% safe for human and pets. The pest reject adopts the physical way and humane solution to repel mice and pests out from home instead of killing them, no chemicals, no smell, non-toxic and radiation free._x000D_ [Wide Coverage & Energy-Efficient] The device is effective for an area up to 80-120m2. The best efficiency is equipped in houses and apartments, in offices, hotel, warehouses , garages, attics, basements, farms and so on. Using 1 device for each room is recommended as ultrasonic effect will be weakened by walls and solid objects. It is an economical and effective pest control solution compared with expensive pest control service. Specifications: Electric voltage: 180V-250V/ 50HZ: 90-110 v / 60 hz_x000D_ Work rate: 6W_x000D_ Output frequency: 20khz-55khz_x000D_ Effective coverage: 80-120m2 open space_x000D_ Color: White|Black_x000D_ Package Included: 1 x Ultrasonic Pest Repeller Notes: 1. The machine should be installed 20 ~ 80cm away from the ground, and the power socket should be inserted perpendicular to the ground._x000D_ 2. The installation point should avoid carpet, and other sound-absorbing materials as far as possible, so as to prevent the reduction of sound pressure, reduce sound area and affect insect repellent effect;_x000D_ 3. During the first few of use, it is normal to find that activities of mice and pests increase significantly. Rats and insects that normally hide in thei _x000D_