[New Generation Ultrasonic Technology]This ultrasonic pest repeller is the latest version that use upgraded chip which is more powerful and makes pests and rodents harder to immunize than before, works well on mosquitoes mice ants cockroaches cockroaches flies flies spiders fleas and more pests. [Easy to use]Ultrasonic rodent simple to use, just plug it into a socket and adjust the level, it is very easy to use. This ultrasonic device should be installed 80-120 centimeters from the ground. And vertical to the ground and connect to the socket. [Wide Working Range The]Ultrasonic insect repellent can cover a maximum of 80 ~ 120 square meters (open area). Since ultrasound cannot pass through walls, it is recommended to use one device per room for best results. It is also ideal for bedrooms, shopping malls, offices, garages, lofts, basements, warehouses. [Safe and Harmless]The Ultrasonic Pest Repeller is 100% environmentally safe it does not pollute it is harmless to human body safe for children and its frequencies do not influence domestic pets.At the same time, it does not have any harmful chemicals and radiation, so it is safe to use.