NIUNIU SOLAR CHARGE: There is a solar panel on the cat repeller which can be charged in the sun using solar power. Solar charging is so cheap and eco-friendly that it can also save you a lot of money. ULTRASONIC AND PIR SENSOR: Equipped with a PIR sensor for motion detection, this repeller with ultrasonic cat repellent sends ultrasonic sound to effectively repel intruders such as dogs, cats, martens, badgers and foxes. WATERPROOF DESIGN: This cat repellent has a weatherproof design that allows to the deterrent to withstand harsh outdoor weather conditions. (However, if it rains too hard, it is recommended to put it indoors.) TWO CHARGING METHODS: With a solar panel on the top of the device, it can charge the energy, save energy and protect the environment. It can also be charged with the USB cable (the USB cable is included). USE METHOD AND WIDE RANGE: The PIR infrared motion sensor has an angle of up to 110 degrees and a range detection range of up to 8m, which activates the animal repellent to emit high frequency sounds that irritate animals and keep pests and animals awayfrom your garden.