Ultrasonic Pest Repeller - Sonic Pest Control Device, Repels Insects And Rodents Efficiently, Electronic Plug In Pest Control Mosquito Repellent,Ultimate Indoor Coverage,2018 Upgraded (White) 2018 Newest Pest Repellent control technology: With the latest pest control Ultrasonic & Electro Magnetics technology to interfere with the central nervous system of pests, mice, spiders, fleas, and others, leaving them nowhere to hide. Wide Effective Coverage: Ultrasonic waves cannot pass through walls and solid materials, so we generally recommend an insect repeller in a room, each suitable for areas up to 800-1000 square feet. Easy Usage and effective: It works plugging the pest repellent into the socket and the breath light starts to work with flicker.Please make sure there are no obstacles in front of the insect repeller so that the pests will be expelled within 2-4 weeks to achieve perfect results. Environmental - Friendly: This ultrasonic pest repellent is only audible to pests. Humans and pets wont be effected, and there is no harm to pregnant women and children. But if you keep hamster as a pet in your house, please use it carefully. LIFETIME GUARANTEE ASSURANCE: We devote ourselves to provide superior after-sale service and guarantee 100% refund for quality issues. Please contact us if there is any problem of our pest repellers.