【POWERFUL WIND AND QUIETNESS】 The maximum rotating speed of the fan is 3200 rpm which is enough for personal use to keep you cool. Low and medium settings are decent and super quiet which ensure the peaceful flow of air. The fan works on the principle of more airflow, but less noise to give you a relieved sleep. 【3-13 WORKING HOURS AND ADJUSTABLE 3 Speedster outdoor fan operates with 2200mAh Improved battery (type-18650) and can operate for 3-13 hours after a full charge. The speed of this portable desk fan can also be adjusted among low, medium, and high according to your demands. 【PORTABLE AND COMPACT】It is trouble-free to put this small (4.1x1.6 X 5.9 inch, weight-7 ounces) and the exquisite rechargeable fan into a bag and carry it for outdoor events. Also, it can be used for indoor purposes if you need a portable fan to create flow in every corner of your premises. 【SIDE AND INTERNAL LED LIGHT】 The blue internal LED lights infused in the fan make it even more advantageous and attractive to look at. The side light is quite bright and can be useful in the dark areas or if electricity is out. It is a perfect companion for any outdoor plans and traveling purpose. 【USB POWERED FAN 】 This fan runs on 5 volts DC, which is the USB standard. You need to plug the fan into an USB port for power like an USB outlet, computer, laptop or power bank and so on. This handheld fan will work on 110 or 220 volts which can be carried to all over the world.