1. [Ultrasonic insect repellent] : This ultrasonic insect repellent for pest control works by emitting a disorienting pulse. Ultrasonic insect repellents are very effective for pest control, keeping pests away from your home or office. 2. [Easy to use] : Just plug the electronic insect repellent into the power socket. This time, when the blue light came on, the machine started working. Most customers can see results within 3-4 weeks! Then we can say goodbye to pests and rats! 3. [Wide effective range] : The effective indoor area of this product is 1800 square meters. Widely used in homes, warehouses, offices, gardens, hotels and so on. We recommend that you install one for each room, as ultrasonic waves cannot penetrate walls and solid objects. 4. [Safety for humans and pets] : The ultrasonic frequency of the electronic mosquito repellent is inaudible to humans and pets, which is environmentally friendly. Mouse-repellent ultrasound plug-ins do not destroy insects but remove them from the covered area, without chemicals and smoke, and are ideal for people who do not want to clean for long periods of time. 5. But for areas with high levels of vermin, we recommend installing 2 or more units in other rooms. If you install devices in one room, they won't work in other rooms.