【8000mAh Battery Capacity】With 8000mAh large battery capacity, Jisulife camping fan provides 8.5-25 hours working time on full charge within 7-8 hours depending on the load, which is sufficient for the whole day. You can easily charge it via USB power adapter or computer. (Working time varies with different wind speed ratios.) 【Versatile Use】This portable USB camping fan is an ideal choice for camping, fishing, outdoor events or a dormitory. With a hanging hook at the top, allows you to hang it on tents, tree branches or anywhere you want. It is a lifesaver for camping days or during hurricane season and other emergency blackouts. 【4 Wind Speeds】There are 4 wind speeds to meet your different cooling needs on hot days and nights. (Low-medium-high-natural wind). This USB camping fan works for 25/16/8.5 hours under wind speed 1/2/3. Removable Fan Blades: Designed with removable fan blades, this portable tent fan USB is easy to carry, store and clean. It takes up very little space in your backpack, an ideal companion for outdoor events. 【Remote control and timer function】This battery-operated camping fan has a remote control that allows you to adjust the wind speed and easily set the timer when you're lying in the dorm or in your tent. It provides powerful airflow to cool you down from sweating. Besides, there are 4 timer modes optional: 2/4/6/8 hours.