Enhanced pet control technology: Using effective and safe technology disrupts and stimulates the nervous system of pests, making it more powerful, making pests and rodents more difficult to immunize than before. So we can say goodbye to pests and miceEasy to use: just plug the insect repellent into the outlet. Be sure to install it vertically 7-32 inches from the ground. And make sure there are no obstructions such as curtains or cabinets in front of the insect repellent.Safer for Children and Pets: Unlike traditional insect repellents, this electronic insect repellent is more environmentally friendly and contains no harmful chemicals, but uses sound waves ultrasonic frequency (22-65Khz) to drive away harmful insects and kill them without killing them themselves. It is cheaper and more durable than insect repellents and other pest control methods.WIDE AND EFFECTIVE COVERAGE: Insect and rodent repellent is suitable for indoor spaces up to 1,600 square feet. We recommend that you install one for each room, as ultrasonic waves cannot penetrate the walls and solid objects. For large storage areas with severe pests, additional units are required."Working principle": When the device is powered on, the indicator is red. And there are two 2 modes. The first mode is silent frequency conversion, which is mainly used to repel mosquitoes, cars, flies, etc. When the first mode is activated, the pilot light is blue. The second mode, which produces a soft sound, is mainly used for squirrels, and the luminous color changes to emerald green.