DuaFire Indoor Plug-in Ultrasonic Pests Insects Repellent with Air Purifier Night-light Repeller for Cockroach Rodents Fly Roaches Ants Spiders Fleas and more Ultrasonic Pest Repeller -- Adopting the most advanced pest control technology to effectively eliminate those rodents and pests such as Cockroach, Rodents, Fly, Roaches Ants Spiders, Fleas, Mice. Performance result usually will take 2-3 weeks to show depending on the amount of infestation Safe and Healthy -- Driving away Rodents without using any kind of poison, risky traps, or chemicals that smell horrible and burns your eyes . Inaudible to the human ear but extremely annoying to roaches, rats and ants. It will not harm your children, or pets Air purified function -- Creating a stream of beneficial anions to disinfecting and clean the air,brings you a healthy life as well as repel pests The duafire ultrasonic pest repeller easy use -- Plugs into any wall power outlet in your house and make sure put the plug into socket with no surrounding objects. Typical results can take 2-3 weeks depending on the amount of infestation Enhanced Electromagnetic waves -- to reach deeper even into the walls , cracks and crevices through your home or office to repel impossible reached pests, making the effective range more widely. The longer using period, the better performance