U-miss Ultrasonic Pest Repeller Plug in Pest Control - Mice Repellent & Rat Repellent in Pest Repellent - Bug Repellent for Ant,Mosquito,Mice,Flea,Fly,Spider,Roach,Rat -(6 Pack) [2018 UPGRADED PEST CONTROL TECHNOLOGY]This Ultrasonic pest control repeller repels pest and mice with the ultrasonic and electromagnetic waves by attacking their nervous system, which makes them even mice extremely uncomfortable. [WIDE EFFECTIVE COVERAGE]: The Insect & Rodent Repeller is effective in an indoor area up to 1600 sq. ft. Its widely used in homes, warehouses, offices, gardens, hotels, etc. We recommend you to install one for each room because the ultrasound cannot penetrate walls and solid objects. [KEEP HUMANS & PESTS SAFE]: The ultrasonic pest repellent is only audible to pests such as mice. Humans and pets wont hear anything, and no harm to pregnant women and children. But if you keep hamster as a pet in your home, please do not use. [EASY TO USE]: Just plug the pest control repeller into the socket. Please make sure to install it vertically 20-80 cm away from the floor. And make sure there are no barriers like curtains or cabinets covering in front of the repeller. Then we can say goodbye to pest and mice! [90 DAYS PRODUCT WARRANTY]: Normally, it costs 2~3weeks for a distinct result. No mice can escape our ultrasonic waves. We offer a 90 days warranty from the date of purchase. If there is no content result after 3 weeks, we will issue you a full refund.