frequency range: 20~55KHZ Operating area: 80-120 square meters Scope of application: can be used normally in a variety of environmentsIt uses ultrasonic and electromagnetic dual-chips to work at the same time, disorienting the auditory and nervous systems of pests and repelling them quickly and effectively. It can fight against most flying and crawling pests, such as mosquitoes, spiders, bed bugs, cockroaches, mice, fleas, ants, fruit flies, etc.100% safe for humans and pets-Ultrasonic mosquito repellent is based on physical methods to completely eliminate pests. It constantly emits ultrasonic waves, making pests uncomfortable and fleeing the house. Compared with traditional pesticides, ultrasonic insect repellents are non-toxic, tasteless and harmless to humans and pets (except pets such as hamsters), and have greater safety. Wide effective coverage-It is widely used in homes, warehouses, offices, gardens, hotels, etc. Ultrasound cannot penetrate walls and solids. It is recommended to place this insect repellent vertically 20-80 cm from the ground. Equipping each room with insect repellent can provide the best results.Easy to use, plug and play-you only need to plug the electronic pest control system into a wall outlet, no tools are required. Make sure there are no obstructions, such as curtains or cabinets covered with mosquito repellent. Safety precautions-Do not use this latest insect repellent outdoors, in hot or humid environments, and keep children and pets away. The typical impact may take 3-4 weeks, depending on the number of infections.