Features: The fan runs when plugged to the solar panel. And it can be used alone by plugged into computer USB port. When plugged to the solar panel, how the fan works depends on the sunlight. When the sunlight is strong, the fan works fast. When the sunshine is not strong enough, the fan may work low or even does not work. There is no rechargeable battery in the fan. If you need the fan works at night, you can use a power bank. The solar panel can be used separately as a power bank to charge your mobile phone. Portable and lightweight, suitable for traveling, self-driving tour, camping, hiking and other kinds of outdoor activities. Specifications: Condition: 100% Brand New and High Quality Material: Iron Color: Black Fan Size: Approx. 22.5 x 18cm / 8.8 x 7inch Solar Panel: Approx. 21.5 x 16.5cm / 8.4 x 6.5inch Working Voltage: 6V Working Current: 0-865mA USB: USB2.0 Weight: Approx. 930g Package Included: 1 x 8inch USB Fan 1 x Solar Panel