How it works: The patented system sends ultrasonic waves to confuse and disrupt pests so they can’t feed or nest there, driving them out of the house. Effectively repels rodents, cockroaches, spiders, mosquitoes, bed bugs and ants. Child and Pet Safety: Humans and household pets cannot hear ultrasound. Environmental protection, non-toxic, no traps, no dead insects, non-toxic and tasteless. Design life 3-5 years: This product can be used for night light, low power consumption, suitable for long life. EASY TO USE: Just plug in the ultrasonic repellent and it will start emitting different frequencies to protect your home (living room, bedroom, kitchen, garage and attic) from pests. Occurs within 2-3 weeks: The pests will increase at the beginning, which is normal because they are moving away from their habitat after the ultrasonic attack. A reduction in pest activity should occur within 2-3 weeks.