1.【Ultrasonic Technology】This ultrasonic repellent can repel mice, bats, squirrels, spiders, cockroaches, wasps, ants, crickets, bed bugs, silkworms, mosquitoes, bees and other small pests.2.【Wide effective coverage】This rodent exterminator indoor ultrasonic is suitable for 30 square meters (no wall blocking), widely used in homes, warehouses, offices, hotels, etc. We recommend that you install one for each room, as ultrasonic waves cannot penetrate walls and solid objects. But for areas with severe pests, we recommend installing 2 or more repellents.3.【More comfortable for babies and pets】Our mouse repellent plug-in is eco-friendly and effective. Ultrasonic repellents cannot be heard by humans and pets. Replaces harmful and dangerous chemicals, poisons and traps without unpleasant odors. Throw away harmful poisons, typical traps and dangerous chemicals like cockroach killers used in the home for pest control.4.【Easy to use】Just plug the repellent into the socket. Make sure to mount it vertically 7-31 inches from the floor. And make sure there are no obstructions such as curtains or cabinets in front of the repellent insert.5.【Application】It usually takes 3~4 weeks to get different results, depending on the number of infestations.