A. Lightweight and Portable Fan: It is a large portable size and not heavy to carry. The belt design frees your hands, making it suitable for traveling, hiking, camping, and outdoor activities. B. High - performance battery: The mini USB fan is powered by a built - in 14500 rechargeable lithium battery. After charging for 2 - 3 hours, it can provide 2 - 4 hours of continuous use. This portable fan comes with a USB charging cable, and you can charge it using a regular socket, computer, car charger, or any other device with a USB port. C. 3 Adjustable Speeds: The portable fan has 2 adjustable wind speeds. You can control the fan speed by repeatedly pressing the power button. The maximum rotation speed can reach 8200 rpm. The fan blows strong and long - lasting wind, helping you cool down in the hot summer. D. Foldable Portable Fan: This mini portable fan can be folded up to 180 degrees. It can be used as a portable fan outdoors or as a mini desk fan on the desk in the office, suitable for summer travel or outdoor sports. E. Powerful Wind: Equipped with 5 fan blades, it is powerful enough to support the blade running at ultra - high speed. At high speed, it can create strong airflow and cool you down quickly.