Latest Ultrasound Technology and Upgraded Chips: Using the latest ultrasound chips, it has an effect on the auditory and nervous systems of mice, rats, spiders, fleas, cockroaches, ants, flies, mosquitoes, making them unpleasant and uncomfortable, which will put them Drive them out of your home to keep them from coming near your home. What's more, this repellent doesn't kill pests. Friendly and Economical - This electronic bug repeller is friendly to humans and our lovely pets like dogs and cats. Odorless, noiseless and radiation-free. Pest control uses sound waves to drive away pests and rats without killing them, leaving nasty dead insects or rodents for you to deal with. Easy to use and install: Just plug in our ultrasonic bug repellent and it will work when you notice a hazy glow. The unit should be installed 10-30 inches from the ground, with no other obstacles within 1 meter. Coverage area: The maximum coverage area of our ultrasonic insect repellent can reach 1200 square meters. We recommend 1 unit per normal room with pest problems, as solid walls can weaken the effect of ultrasonic waves. Larger areas will require additional units. Multipurpose: Suitable for living room, bedroom, kitchen, shop, house, warehouse, garage, apartment, shed, tenant, etc. Package includes: Mosquito repellent (European regulation)