Features: 1. When connected to the solar panel, the fan can run; and can be used alone by plugging into the computer's USB port. When connected to a solar panel, the way the fan works depends on the sunlight. 2. When the sun is irradiated to generate hot air, the fan will rotate immediately to dissipate heat in time, ventilate and ventilate, save the trouble of pulling wires, and make it safer and more convenient. There is no rechargeable battery in the fan; if you need the fan to work at night, you can use the power pack. .
eBay