When related to the solar panel, the fan can run; and can be utilized by myself via means of plugging into the computer's USB port. When related to a photo voltaic panel, the way the fan works will depend upon the sunlight. When the solar is irradiated to generate sizzling air, the fan instantly rotates to apply up warmth in time, ventilate, save the trouble of pulling wires, and it's safer and more convenient. There is not any rechargeable battery in the fan; if you would like the fan to paintings at night, you need to use the ability pack. Specification: Solar panel chip: Polysilicon Solar panel power: 5W, 6V Panel size: 14/5 Mini fan: Size: four inches Power supply: USB plug, 5V USB cable length: 70cm/27 Material: Metal colour: black Package Contents: 1 x Solar Panel 1 x Fan Only the above package content, assorted item will not be included. Note: Light capturing and various displays could cause the color of the item within the photograph a bit assorted from the genuine thing. The length allowed error is +/- 1-3cm.