Working PrincipleThis outdoor cat repeller uses ultrasonic with flashing intensity to repel birds, mice, cats, boars and other animals, because strong ultrasonic signals may make an animal feel uncomfortable, but this ultrasonic type is almost inaudible to humans, so you can achieve the goal of chasing animals and letting them leave your mansion and garden. Removes the alarm functionThis cat repellent removes the alarm function, reducing the impact of noise on humans and not disturbing neighbors, no messy chemicals or pesticides, no traps, no dead animals . In addition, because the frequency range of the emitted ultrasonic waves is different, the emitted ultrasonic waves have no effect on pregnant women, children, friendly to humans and the environment. Solar Charging + USB ChargingOur garden cat repellent has a solar panel, which can be easily charged, can be continuously charged by sunlight enough to meet daily consumption. If it's raining outside, you can use USB charging. indoor cat repellent is especially suitable for use in places where it is not practical to supply power, such as farms, gardens, lawns, kindergartens. 5-speed adjustable frequency There are 5 different frequency choices. You can choose it according to your needs Level 1: Mouse, Dog, Rabbit, Fox, Mink, etc. Level 2: cats, raccoons, badgers, skunks, etc. Level 3: bats, birds, mice, etc. Level 4: Strong flashing LED, sound and light alarm: snake, raccoon, boar, mink, etc. Flashing LED. Waterproof The ultrasonic cat repellent with waterproof design that can work on rainy days. Note: Do not submerge in water. You can simply push the ultrasonic animal cat repellent into the ground. companion for yard, patio, driveways, garages, attics, porches, boats, gardens, farms, ponds, etc.