Feature:1. Eco Friendly and Energy Efficient: The USB fan functions efficiently when it is connected to a solar panel, providing an energy saving solution that is ideal for environmentally conscious users.2. Adaptable Speed Control: The fan's operation is dependent on the sun's brightness. It operates quickly under strong sunlight and slows down or stops depending on the sunlight's strength, giving an adaptable speed control.3. User Friendly and Convenient: Solar radiation generates heat causing the fan to spin, venting and cooling in time. It saves the trouble of wiring, resulting in a safer, more convenient user experience.4. Versatile Powering Options: While the fan doesn't have a rechargeable battery, it can be powered through a power group for nighttime use, meeting the usage needs in most situations.5. Broad Applicability: This solar panel powered fan is suitable for a variety of settings, including pet houses, chicken coops, truck cabs, RVs, and camping ventilation, demonstrating itswide range of practical applications.Specification:Item Type: Solar Panel Powered FanMaterial: Monocrystalline silicon, PET laminate, ironWeight: Approx. 330g/11.6ozRated Power: 5WMaximum Power Point Operating Voltage: 5VOpen Circuit Voltage: 6.5VShort Circuit Current: 1AMaximum Power Point Working Current: 0.8AIrradiation Ratio: 30000.Package List:1 x Solar Panel1 x USB FanNote:No power storage function