Fyearfly Portable Solar Panel, 5W Mini Solar Panel with Portable Cooling Fan Photovoltaic Solar Panel Set for Greenhouse

【SOLAR POWERED】The fan starts to operate when plugged to the solar panel and it can also get power from other USB devices, such as power bank, computer, etc. 【PORTABLE DESIGN】Portable, small size, easy to carry around. No batteries needed, super silent and green energy, environmental protection. 【NOTE】There is no rechargeable battery in the fan. If you need the fan to work at night, you can use the power pack. 【SOLAR POWERED FAN】When connected to a solar panel, the way the fan works depends on the sunlight. When the sunlight is strong, the fan works quickly.