Function: 1. Two ways: After connecting the solar panel, the fan can run, and it can be used alone by plugging it into the USB port of the computer. 2. Simple and convenient: when connected to a solar panel, the way the fan works depends on the sunlight. It saves you the hassle of pulling the line, it is safer and more convenient. 3. Sunlight determines the work intensity: When the sun is strong, the fan runs very fast, when the sun is not strong enough, the fan may run very slowly or not even work. 4. Working process: When the fan is irradiated by the sun to produce hot air, the fan will turn immediately to dissipate heat over time and ventilate. 5. Charging Power Bank: There is no battery in the fan. If you need a fan for night operation, you can use a power bank. Specification: Item Type: Outdoor Solar Panel Fan Color: as shown in the photos Weight: approx. 331 g / 11.7 oz Solar panel power: 5W Solar panel voltage: 6V Solar panel current: 0.5A Solar panel output interface: single USB socket Fan Diameter: Approx. 137mm / 5.4 inch Fan power supply: 5V USB plug Fan USB Cable Length: Approx. 70 cm / 27.6 inch Material: monocrystalline silicon PET laminated iron (fan) Solar Panel Size: Approx. 145 x 145 mm / 5.7 x 5.7 inch Solar panel system: monocrystalline silicon Package List: 1 x solar panel 1 x USB fan First, turn on the solar panel of the product and the solar panel is facing the sunlight. When connected to the solar panel, the fan can run and can be used alone by plugging it into the USB port of a computer.