Improved Modern Technology: This three-speaker pest repeller uses high-intensity ultrasonic and pressure wave technology to effectively stimulate the pests' neural auditory system to keep your house clean. Wide Coverage: A simple plug-in electronic pest repellent system effectively covers indoor areas to repel a variety of pests such as bed bugs, mice, moths, ants, mosquitoes, spiders, cockroaches, squirrels, flies, rodents, etc. Safe for Humans and Pets: The pest repellent uses specially designed dedicated sounds to provide 360-degree protection over the hearing of humans and pets at the same time, eliminating the need to use rat poison, mouse traps or rat traps that are unsafe and may harm pets or children. Four-Function Switch: This indoor insect repellent has two function switches that can be manually operated to cover different practical functions, including test, super, trans and double switches, making it an ideal choice for homes, cafes, warehouses, supermarkets, restaurants, offices, garages and granariesPackage Contents: 1*Host+1*EU Adapter