ULTRASONIC TECHNOLOGYThis ultrasonic insect repeller is the latest version,The product can repel mice, bats, squirrels, spiders, cockroaches, wasps, ants, crickets, bedbugs, silkworms, mosquitoes, bees and other small pests. WIDE EFFECTIVE COVERAGE This rodent repellent indoor ultrasonic is suitable for 1600 square feet of area, It's 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. But for areas with serious Vermin, we suggest install 2 or more pest repeller. MORE COMFORTABLE FOR BABYS AND PETS Our mice repellent plug-ins is 100% environmental and effective. The ultrasonic repellent will not be heard by humans and pets.Alternative to harmful and dangerous chemicals, poisons and traps, without bad smell.Throw away the harmful poisons, traps typically and dangerous chemicals typically like roach killer used in households for pest control. EASY TO USE Just plug the pest repellent into the socket. Please make sure to install it vertically 7-31 in away from the floor. And make sure there are no barriers like curtains or cabinets covering in front of the mice repellent plug-ins. If you have any qustions, please contact us Scope of supply : Ultrasonic Pest Repeller * 1 pc