PORTABLE FOLDING DESIGNMini handheld fan is only the size of the palm. Using a portable folding design, its 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 BATTERYOur 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 BANK3000mah 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 & QUIETPortable 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 its in a quiet reading room will not disturb you.^VERSATILITY FANRechargeable 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. ^