[Rechargeable Battery Fan - Provides 3-5H of Wireless Working Time] Use a safe rechargeable battery, which can work for 3-5 hours when fully charged, and can be charged hundreds of times, and ensure safe use. [3 Speed Levels] The portable fan with 3 speed settings can be adjusted according to your requirements. The fan has strong and long-lasting wind, which can keep you cool and comfortable in the hot summer. [Humanized Fan Design] This mini fan has a foldable handle design, which is very suitable for outdoor carrying, bringing you coolness during outdoor activities in hot summer.