Description: -- The fan runs when connected to a solar panel; and can be used alone by plugging into a computer USB port. -- When connected to a solar panel, the way the fan works depends on sunlight. -- When the sun shines to generate heat, the fan rotates immediately, dissipating heat in time, ventilating and ventilating, saving the trouble of pulling wires, making it safer and more convenient. -- There are no rechargeable batteries in the fan; if you need the fan to work at night, you can use a power pack. .
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