◆NO SPRAY, POISONS OR CHEMICALS. 100% humans and pets friendly. No poisons, no chemicals, non-toxic. The ultrasonic technology can drive pests and insects away without killing them. Eco-Friendly and save your effort to clean up the dead insects. The ultrasonic waves only target pests providing the SAFEST environment for your children and pets. ◆ALL PESTS CONTROL. This ultrasonic insect repellent can effectively repel all the pests, like spiders, mice, mosquitoes, rats, cockroaches, roaches, ants, snakes and so on with its super-safe ultrasonic waves. Help you rebuild a clean and comfortable home. ◆FREQUENCY CONVERT AUTOMATICALLY & WIDE COVERAGE AREA. Our cutting edge technology is not only powerful but also covers a large distance area and is highly effective up to 1800 sq ft which you can use in any room you desire. Automatic frequency conversion makes it not easy for pests to get used to the same frequency. Ultrasonic frequencies do not travel through walls, so for the most effective pest control, ultrasonic devices need to be placed in multiple rooms. ◆EASY TO USE. Ultrasonic pest repeller require NO maintenance, just plug it into a power outlet ideally around 80-120cm above floor level and let it work the magic for you! For best use wait for 2-3 weeks before powerful results are seen and revealed. It costs less than £1.00 every year to run this device! Simple & Effective. ◆LIFETIME QUALITY ASSURANCE. KOEPUO mosquito repellent plug in comes with lifetime quality assurance. Any problem we will deal with it for you within 24 hours. We hope this pest repellent will build a warm and comfortable environment for you.