[Plug and Play and Ultrasonic Insect Repellent Night Light]: Just plug the electronic pest controller into the wall socket without any tools. It is recommended to use a unit of about 30 square meters. It is also a small night light that can light up thenight. 2 brightness levels, freely switchable. [Note: The night light function cannot be turned off. ] [Innovative frequency conversion technology]: The latest frequency conversion technology is adopted to effectively affect the neuro-auditory system, so that pests and mice cannot develop immunity to insect repellents [Safety and Environmental Protection]: No poisons, chemicals, traps and kills. Insect repellent is 100% safe and harmless to humans, children and pets. It is a physical method to remove pests, non-toxic and environmentally friendly. It is an insectrepellant that combines advanced technology and humanitarianism. It is cheaper and more durable than expensive pest control companies and other pest control methods Invincible Pest Control: Very effective against pests such as mice, rats, rodents, cockroaches, flies, mosquitoes, bugs, fleas, spiders, ants, bats, etc. All pests are hardy. Therefore, these require at least 2-6 weeks of continuous use (depending onthe severity of the infestation) to ensure all infestations are removed, and then a lifetime of continuous use to prevent these infestations