When connecting to a solar panel, the fan ' s speed is dependent on sunlight intensity, it work faster under strong sunlight and may run slower or stop working when sunlight is insufficient The fan operates when connecting to the solar panel, and can also be used independently by plugging into a computer ' s USB port for added convenience This solar fan is great for various use, including pet cooling, truck cab ventilation, and camping, ensuring freshly air circulation in multiple environment The solar fan eliminates the need for wire, making it safe and more The solar panel powered fan is make of monocrystalline silicon materials, which can effectively convert sunlight into electricity, Manufacturer: YanFengPro