UPGRADED PEST CONTROL TECHNOLOGY: This mouse repellent emits different frequencies of ultrasonic waves to irritate the nervous system of insects and rats, making them feel uncomfortable and flee away gradually. Effectively repelling pests like mice, rats, mouses, ants, mosquitoes, spiders, cockroaches, rodents, etc. . Safe & Environment-Friendly :Without poison, traps, and killing, the Pest Repeller is 100% safe and harmless to humans, children, and pets. It is a physical method to drive pests away, non-toxic, eco - friendly, and absolutely safe for children and pets, a pest repellent combining advanced technology and humanitarian. . LIGHTWEIGHT DESIGN: The ultrasonic pest repeller is portable and easy to install, just plug and play. Widely used in home, warehouse, office, garden, hotel, etc. Energy-saving keeps you safe from pest intrusion all day long without worrying about your bill. . EASY TO OPERATE & Full Coverage: Simply plug pest repeller in a wall socket 31~47 inches away from the floor and keep it vertical to the ground. It works when the blue LED night light on. No more annoying insects in your house. For the best result, equipped each room with one pest repellent. For indoor use ONLY . EXCELLENT AFTER-SALES SERVICE: Please note that our mosquito repellent takes 3 or 4 weeks to achieve obvious results. We offer a 24 hours customer service, please directly contact us if there is any question, we will help you solve it. .