Longer running time: Rechargeable battery or USB charging. The rechargeable USB fan battery comes with a 2600mAh battery for longer outdoor use (2.5-6 hours depending on speed). The battery requires about 3 hours for a full charge. This USB Desk Fan Also Powered By USB For Indoor Spaces Such As Computers, Laptops Or Power Banks And Offers More Comfort. Notice: Actual color may be slightly different from the image due to different monitor and light effect; Please allow 1-3cm deviation due to manual measurement. Gift Idea: Its beautiful look make it a really creative gift idea. It is a great and unique gift item for families, kids, friends in special days such as Birthday, Christmas and Year's day. Sale Guarantee: If you have any questions about the product, please contact us, our professional customer service team will solve the problem for you as soon as possible.