[PIR Infrared Sensor] Our ultrasonic cat repeller is equipped with a PIR sensor. An infrared sensor that emits signals continuously. When it detects that a moving animal is within the detection range, it automatically emits a sound wave frequency to drive the animal away. [Solar Powered and IP44 Waterproof Design] This ultrasonic cat repeller can work in all weather, its waterproof rating reaches IPX44. Its waterproof design allows it to work in all weather conditions such as rain, snow, ice and wind (do not soak in water). [Solar Charging] A solar panel is placed above the mouse repeller, which can be charged by solar energy in the sun. Efficiently charged to maintain a long standby time all day, no need to replace the battery, energy saving and environmentally friendly. Can work effectively all year round in almost all weather conditions. [Easy Installation] The ultrasonic animal repellent comes with a pole that can be connected directly to the ground. Portable and small design, it can be installed in your home, garden, yard or elsewhere. It can help you stay away from naughty stray dogs, stray cats and other small animals, thus protecting your property and garden. [Eco-friendly and Versatile] The powerful outdoor cat repellents do not contain any chemicals or pesticides, safe for humans and pets. Ideal for driving away cats, dogs, rodents and any other unwanted animals. Ultrasonic animal repellent ideal for garden, yard, lawn, farm, kindergarten, etc.