Longer working hours - with a built-in 5000mAh rechargeable battery, this battery powered fan can operate continuously for 5-34 hours depending on the speed. If only LED lights are used, depending on the brightness, they can last for 9 to 220 hours. Using a standard USB charging cable, the fan can be fully charged within 3-4 hours through a device with a USB connector (such as a power bank, adapter, or car charger). Various uses - there is a built-in hook at the bottom, and a small fan can be hung in tents, branches, cars, etc. It can also be placed on a table or installed on a wall. One of the best choices for camping, sleeping, traveling, reading, and more. Portable and Durable - This portable small fan is made of high-quality ABS material, which can prevent ordinary impacts, so you can use it with confidence in various outdoor occasions. Small size can easily fit in your backpack. When you don't use it, it won't take up any extra space.