Upgraded Ultrasonic Pest Repeller:The Upgraded Pest Repeller using intelligently three-layered bionic wave, it works by emitting a disorienting pulse, which directly affect each pests the neurological auditory and immunity , keeps pests away from your home or office, it’s suit for house, warehouse, office, hotel. Safe & Eco-Friendly Pest Control:LNon-toxic, No chemicals, No radiation,Less power consumption, No noise and 100% Safe to human and pets, you will say goodbye to mouse traps, mouse mats, pest poison, and insect sprays, etc , and no need to clean dead pests, no more need to call pest control technician for help; No-battery required will save a lot of money for you Wide Coverage Area & Covers 1200 sq.ft:The Ultrasonic insect repellent equipped dual microchip system, which covers up to 800-1200 sq.ft. ftmeter; Since Ultrasound cannot Penetrate walls and solid objects, It is recommended to put one in one room. For areas where severe pests, additional units when needed, and please