Working principle: This animal repellent device is the use of ultrasound with flashing intensity to repel birds, mice, cats, wild boars and other animals. When an animal enters the area , a detector infrared is activated and ultrasonic cat repellent, it emits a frequency converted ultrasonic wave so that the animal can expel the area. (Detection distance: 3-10 m.) Ultrasonic Protection: Dog repellents only emit ultrafine wave from 13.5kHz to 28.5kHz, which is safe to human body and harmless to human body. At the same time, it does not contain chemical and hazardous substances. It will only make animals without harming them. The humanized design will not harm your cats, dogs or other pets. 5 Frequency Controls: There are 5 different choices on the frequency. Level 1: mouse, dog, rabbit, fox, mink, etc. Level 2: cats, chicks, taxes, puzzle, etc. Level 3: bat, mouse, etc. Level 4 powerful flashing: Snake, ham, strap, mink, etc. Level 5 full-wave gears to guide animals and flashing lights, frequency of one to five gears work in turns, accompanied by strong flashing. Solar Charging: Our mosquito repellent has solar panel, which can be easily charged, can be continuously charged by sufficient sunlight to satisfy daily consumption. Therefore, this product is particularly suitable for use in places where it is not practical to supply power, such as farms, gardens, practices, nurseries, etc. Waterproof and Easy to Install: The ultrasonic pest repeller with waterproof design makes it possible to work in rainy days. It is able to withstand normal rain. Note: If you have time or if you are bad, it is advisable to wear it at closing time. Can be installed anywhere in the house, garden or patio, gardens, yards, paths, fields, practices, edges, garages, farms and all outdoor areas.