Longer Working Hours and USB Powered This portable handheld fan operates with 3600mAh Improved battery (type-18650) and can operate for 6-26 hours after a full charge. At the same time, the bi-directional optimization of the motherboard and battery makes this updated version usb fan have longer working hours. It can also be used via USB port from your PC/computer/USB charger or other USB devices. 3-stage adjustable wind speed and Quietness 3-stage easily adjustable wind speed. The speed of this portable desk battery fan can also be adjusted among low, medium, and high according to your demands. it is decent and quiet which ensure the peaceful flow of air. and enough for personal use. Mini makeup mirror & Fan bracketEquipped with a small mirror, you can use it at any time. At the same time, we give a fan stand as a gift, and this battery powered fan can be used either handheld or on the desktop. This desk fan has a strong and stable wind that keeps you cool. not disturbing your rest and work. Safe Guarantee & PortableUsed high-quality ABS and Brushless copper motor. It has stable performance and long operating life. And It is trouble-free to put this small ( 8.2 * 3.5 * 1.6 inch , weight-6.6ounces) and the exquisite handheld usb fan into your bag and carry it for outdoor events. Also, it can be used for indoor use. Ideal suitable for office, family, dormitory, library use and etc.