[PORTABLE FOLDING DESIGN]Mini handheld fan is only the size of the palm. Using a portable folding design, it's only 3.1513.151.38 inch. With only 5.3 oz, it will not take up too much space and weight when putting it in a backpack. Even in your pocket is a breeze. [LONG-LASTING BATTERY]Our Portable Fan has a built-in 3000mAh rechargeable battery, working at low-speed 13H, medium-speed 8H, max-speed can last 4H. Equipped with a USB charging cable, you can easily charge your mini USB fan. Powerful battery capacity, the coolness will always be with you. [EMERGENCY POWER BANK]3000mah battery capacity not only allows the portable personal fans to last long, but also be used as an emergency power bank. The mini handheld has a USB power output port can charge phones at critical moments, preventing phones from shutting down in an emergency. [POWERFUL & QUIET]Portable fan is with high-quality seven-leaf fan blade and brushless motor provide huge blowing area and higher speeds under extremely low noise. The low-speed noise is less than 15 DB, the highest-speed is only 35 DB. Even if it's in a quiet reading room will not disturb you. [VERSATILITY FAN]Rechargeable personal fans are not limited to handheld use. With the folding design, you can fold any angle you need on the table as a mini desktop fan. With the included lanyard, it can also as a neck-hanging fan, which can cool you down when your hands are busy. 2021 UPGRADED VERSION After researching and testing many handheld fans in the market, we combined the various needs of customers and the aesthetics of the product appearance, and finally designed this F20 mini portable fan. Now we continue to try to innovate it so that it has a better performance. New features: Mobile phone holder, now you can enjoy the cool breeze while using your phone. Portability: The mini portable fan adopts a folding design, which is only 6.37*1.35 inch and only the size of the palm when folded. Whether it is in a pocket or a backpack is very easy. Practicality: Folding design makes this hand fan is not only hand-held use but also can be folded and placed on the desktop to use, any angle to meet your needs. There is also a built-in lanyard, which can be used as a hanging neck fan. Durability: Built-in 3000mAh large-capacity battery, even the highest wind speed can last 4H, low speed can use 13H. With USB power output port can also be used as an emergency power bank, effectively prevent the phone from shutting down at critical times. Powerful: Equipped with high-quality seven-blade fan blades and brushless motor, it produces the largest airflow under extremely low noise. 3 adjustable wind speed grades can meet your use in most situations. The maximum noise is below 35 decibels and will not disturb your private time at all. SPECIFICATIONS: Battery Type: Rechargeable Li-ion battery 3000mAh Input Current: DC5V/1.0A USB Ouput Power: 5W Charging Time: 4 hours; Working Time: 4-13 hours Speed Level: 3 speeds mode Speed 1 last 13 hours with full charge battery Speed 2 last 8 hours with full charge battery Speed 3 last 4 hours with full charge battery