1. [Portable Folding Design] The mini handheld fan is only the size of a palm. It adopts a portable folding design, with dimensions of only 3.15×13.15×1.38 inches. It weighs only 5.3 ounces, so it won't take up much space or add much weight in your backpack, and you can even easily put it in your pocket. 2. [Long - lasting Battery] Our portable fan is equipped with a 3000mAh rechargeable battery. It can work for 13 hours on the low - speed setting, 8 hours on the medium - speed setting, and 4 hours on the high - speed setting. It comes with a USB charging cable, allowing you to easily charge the mini USB fan. With its large battery capacity, you can enjoy coolness at all times. 3. [Emergency Power Bank] The 3000mAh battery capacity not only enables the portable personal fan to have a long battery life, but also can be used as an emergency power bank. This mini handheld fan is equipped with a USB power output port, which can charge your phone in critical moments to prevent it from shutting down in an emergency. 4. [Powerful and Quiet] The portable fan is equipped with high - quality seven - blade fan blades and a brushless motor, providing a large - area air supply and higher wind speed with extremely low noise. The noise is less than 15 decibels on the low - speed setting and only 35 decibels on the high - speed setting. You can even use it in a quiet reading room without being disturbed. 5. [Multi - functional Fan] The rechargeable personal fan is not limited to handheld use. Thanks to its folding design, you can fold it at any desired angle on the table and use it as a mini desktop fan. With the included lanyard, it can also be used as a neck - hanging fan to bring you coolness when your hands are busy.