Multifunctional fan and mini size: it can be used as a desktop fan or a portable fan, meeting your different needs with a sleek design. The fan can be placed vertically or at an angle on a table and is ideal for office use. It is compact (87*40*158mm) and easily fits into a pocket, backpack, or beach bag, making it convenient to carry for outdoor activities such as picnics, shopping, travel, and camping. POWERFUL AND QUIET: Utilizing advanced technology, this portable fan delivers up to 3200 RPM at maximum speed while operating quietly, with noise levels low enough to be suitable for quiet environments like a library. LONG-LASTING OPERATION & USB RECHARGEABLE: Equipped with a 4000mAh high-capacity battery, the fan provides 5 to 20 hours of runtime depending on the speed setting. The built-in rechargeable battery is not replaceable for safety reasons. It can be charged via USB using a computer, laptop, power bank, USB wall charger, phone adapter, or car charger. Compatible with global voltage standards, this fan can be used worldwide. QUICK CHARGING & ONE-TOUCH OPERATION: The fan charges fully in approximately 3 hours, faster than many comparable models. The battery supports 2A input current for quicker charging. Operation is simple with a single button: short press to turn on, press repeatedly to cycle through speed settings, and press again to turn off. REMOVABLE COVER: The fan cover can be easily removed by gently rotating it, allowing access to the blades and interior for convenient cleaning as needed.