①. PIR Infrared Sensor: Our cat ultrasonic device is equipped with a PIR sensor, an infrared sensor that emits signals continuously. When it detects a moving animal within the detection range, it will automatically emit a sound wave frequency to lead the animal. ②. Solar Design and Waterproof IP44: This ultrasonic cat repellent can work in all weathers, with waterproof rating reaching IPX44. Its waterproof design allows it to work in weather conditions such as rain, snow, ice and wind (do not soak in water). ③. Solar Charging: A solar panel is placed above the mouse repellent, which can be charged by solar energy in the sun. It charges efficiently to maintain a long standby time throughout the day, no need to replace the battery, energy saving and environmental friendly. It can work effectively all year round in almost all weather conditions. ④. Easy Installation: The ultrasonic animal repeller comes with a pole that can be connected directly to the ground. With portable and small size design, it can be installed in home, garden, yard or other places. It can help keep away from naughty stray dogs, stray cats and other small animals, protecting property and garden. ⑤. Eco-Friendly and Versatile: The outdoor cat repellent contains no chemicals or pesticides, safe for humans and pets. It is ideal for dealing with cats, dogs, rodents and other unwanted animals. The ultrasonic animal repeller is suitable for garden, yard, lawn, farm, kindergarten, etc.