describe Solar Charging: There is a solar panel on the cat repellent, which can be charged by solar energy in the sun. Solar charging is very economical and environmentally friendly, and can also save you a lot of money. Ultrasonic and PIR Sensor: This ultrasonic cat repellent is equipped with a PIR motion detection sensor, which emits ultrasonic waves to effectively repel intruders such as dogs, cats, minks, badgers and foxes. Waterproof Design: This cat repellent has a weatherproof design that can withstand harsh outdoor weather conditions. (However, if it rains too much, it is recommended to keep it indoors.) Two charging methods: The top of the device is equipped with a solar panel, which can be charged by solar energy, saving energy and protecting the environment. It can also be charged with a USB cable (USB cable included). How to use and wide range: The PIR infrared motion sensor has an angle of up to 110 degrees and a detection range of up to 8 m, which triggers the animal