1.Easy to use: The ultrasonic pest repellers are easy to use since it is not required assemble and start automatically after being plugged. You will say goodbye to traditional traps or other messy ways to get rid of pests. 2.Works on various-objects: The mosquito repellent plug in is able to control rodents and insects, mice, rats, spiders, ants, and roaches without making uncomfort to people and pets. Plug this rodent repellent 20 - 30 inches above the floor to repel crawling insects, 40 - 50 inches to repel flying insects. 3.Cover up to 1200 sq.ft: The mice repellers sound can spread up to 1200 sq. ft. But for better results, we recommend one unit per room because the ultrasonic wave would be intercepted by walls or audio objects. This insect repellent plug in is suitable for home, office, hotels, restaurants, attics, ... 4.How it reduces the pests: The mouse repeller plug in features ultrasonic sound waves irritating to rodents and insects causing them to scramble to run away from your home. You may say goodbye the pests and rodents forever as they would not come back again in your house.