Features: The solar panel powered fan is make of monocrystalline silicon materials, which can effectively convert sunlight into electricity. 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. 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 solar fan eliminates the need for wire, making it safe and more convenient. This solar fan is great for various use, including pet cooling, truck cab ventilation, and camping, ensuring freshly air circulation in multiple environment. Specifications: Materials: Monocrystalline silicon Fan voltages: 12V Fan current: 0.15A Fan power: 1.8W Noise:< 22 dBA Solar panel power: 3W Solar panel voltages: 5V Solar panel current: 600mA Fan size: about 12x12x2.50cm/4.72x4.72x0.98inch Solar panel size: about 12x7.8x1.3cm/4.72x3.07x0.51inch Package Includes: 1set Solar Powered Fan note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color.