Feature:1. The fan starts to operate when plugged to the solar panel and it can also get power from other USB devices, such as power bank, computer, etc.2. Portable, small size, easy to carry around. No batteries needed, super silent and green energy, environmental protection.3. There is no rechargeable battery in the fan. If you need the fan to work at night, you can use the power pack.4. When connected to a solar panel, the way the fan works depends on the sunlight. When the sunlight is strong, the fan works quickly.5. Great combination, suitable for greenhouses, dog house, trailers, RV and so on. Also can be used for charging mobile phones.Spec:Condition: 100% Brand NewItem Type: Solar PanelMaterial: IronColor: As shown in the pictureSolar Panel Size: Approx. 14.5x14.5cm / 5.7x5.7in Cooling Fan Size: Approx. 13.5x15cm / 5.3x5.9in Weight: Approx.353g/12.5ozSolar Panel Power: 5W, 6VPower Supply: USB plug 5vApplication: Suitable for greenhouses, dog house, trailers, RV and so onPackage List:1 x Solar Panel1 x FanNote:1. Please allow 1‑2in error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.3. Without electric power storage function.