[Rechargeable Portable Fan]: This mini USB fan features a Type-C charging port and a built-in 3000mAh high-capacity lithium battery, providing 4 to 10 hours of operation on a full charge. It is compatible with 5V power adapters, laptops and desktops, power banks, and other USB devices. The USB port can also be used as a backup power source in emergencies. [4 Adjustable Speeds]: This portable fan offers 4 adjustable speeds at the touch of a button: 3 progressively more powerful speeds and a 4th-speed cycle mode (the cycle mode automatically switches between the 3 speeds to suit your needs). Press and hold the button for 3 seconds to turn it off. [LED Display]: This foldable fan is equipped with a clear digital LED display that accurately shows the battery level and fan speed. It also alerts you when it's time to recharge. [180° Multifunctional Foldable Design]: The handle of this portable fan folds 180°, and when folded, it measures only 9 x 8 x 4 cm. It can be used as a handheld fan, a neck fan (with power cord), a desk fan, or a phone stand. This compact and multifunctional fan is the perfect companion for staying cool while watching TV, at work, traveling, or during workouts, and it's also ideal for hot summer days.