Simply plug this pest repeller into a socket in your home to keep spiders ants mice rats and other rodents and insects away it uses a combination of ultrasonic and electromagnetic waves to repel unwanted visitors to your home not audible to humans and with a pet safe setting so that you wont upset your own animals it is a safe and eco friendly alternative to traps and poisons whats more it simply sends the pests running rather than killing them so there are no dead bodies to deal with