Ultrasonic Pest Repeller (4 Pack) - Electronic Mouse Bug Repellent & Mosquito Pest Control Plug in Rat Repellent Indoor for Insects - Mice,Rat,Bug,Spider,Mosquito,Flea,Roach,Ant,Fly[2018 Upgraded] NEW ENHANCED VERSION - The electrical pest repeller plug in applies the improved ultrasonic waves to disturb and irritate the nervous system of pests, which can drive mice, rats, cockroach, ants, spiders, bed bugs, mosquitoes, insects, rodents, flies, fl EASY TO USE - Just plug the ultrasonic pest repellent in your socket, and it will protect your home from pests all-around with 24/7 effects. Say goodbye to poison, glues, mouse trap and insect spray, no more need to call insect control technician for hel SAFE & ECO-FRIENDLY - The electrical mouse repellent is 100% safe for human & pets with eco-friendly design. Just drive pests away without killing them, no chemicals, non-toxic, no radiation, odorless and noiseless, an environment-friendly and humane sol LARGE COVERAGE AREA - One unit of the ultrasonic bug repellent covers an area up to 1200 sq. Ft., which can be widely used in house, office, hotel, supermarket, hospital, warehouse, and so on. Since the walls or furniture will weaken the effects of ultra 60-DAY MONEY BACK GUARANTEE - The ant repellent is backed by 60 DAYS MONEY BACK and 100% SATISFACTION GUARANTEE.Normally,pests will increase at the beginning of the using days. And typical results can take within 4 weeks depending on the severity of the