Sumpol ultrasonic pest control device uses high performance ultrasonic waves that effectively repel rodents, while being inaudible to the human and pets,animal-friendly, and safe for children.Especially work well on insects, bugs, ants, cockroaches, mosquitoes, flies, spiders, rats, rodents. Sumpol ultrasonic pest control product sent out is inaudible to us human and our lovely pets. No chemicals, and traps typically used in households, it provides an environment-friendly and humane solution, keeps the pests away from your home. Sumpol bug repellent is effective for an area up to 1600 Square Feet. Please note that ultrasonic waves can not travel through walls. If you have a large insect infestation, it will be better for you to put 1~2 insect repellents in each room. No need for assemble, no need for the help of insect control technicians, just plug it into the socket and leave it work. Naturally drives pests out without hurt them, only creates an uncomfortable environment for pests so they simply leave. It is no need for you to clean up dead insects and pests too. Sumpol ultrasonic mice repellent normally takes 2-3weeks to see the typical results depending on the severity of the pests infestation.