Pestek [New Generation] Advanced Ultrasonic Rodent Repelling System - Safe Mice Defense for Home, Ware-House, Hotel, Restaurant, Office Proven technology with three power totally creates an invisible Shield Mix of Ultrasonic, Electromagnetic, Anion,O3 : The striking innovative technology can make three modes work at the same time.The combined waves sending from the device always acts as an invisible powerful wiring net stopping outdoor pests to enter your house Easy to use: Simply plug in this unit and your home gradually becomes completely free of all pests.None of noise are going to fail turning mute after a few weeks use.Ultrasonic sends all rodents and insects irritating signals and forces pests leave your home.However ultrasonic cannot penetrate walls and doors.Electromagnetic can repel pests from inner of the wall.Its signals can also disturb pests who get ready to nest inside your home walls Bonus features: Noise-free on the device while working,rather suitable for bedrooms, and ensure your sweet dreams! Effective for an area up to 1100sq ft,it equips the latest technology./Ionic air purification pumps out beneficial ions that clean the air of pollutants and food odours./Gentle LED night light with smart light sensor Safe for your family or domestic pets: No harmful chemicals,no poisons,no traps