1. "Small size, great function" combines a fan, flashlight, and backup power supply, making it an essential cooling companion for hot weather with various multifunctional uses. 2. [Cooling time] With a full charge, it provides up to 21 hours of cooling, perfect for traveling, commuting, working, or outdoor activities. This mini handheld fan can be charged via USB from any standard USB socket, laptop, power bank, or car charger. 3. [Portable charger] The compact design allows the fan to fit easily in your bag. It can also serve as a backup power supply to charge your mobile phone when needed. 4. [Flashlight] Features a built-in flashlight, which may not be obvious at first, but proves useful for nighttime walks. 5. The 3-stage foldable fan can hide its blades for a compact form, easily fitting into pockets. It transforms into a handheld fan when folded at 180 degrees and a desktop fan when adjusted to 270 degrees.