Perfect For Hot and Sweaty Days: The mini portable fan works wonders while going out to a club or party at hot humid areas. The travel fan brings you a quick relief of wind onto your face,can help cool you down. (AAA battery replacement) A Palm-sized Backup Charger: Designed with a pocket size, this portable fan easily fits into any bag for on-the-go convenience; AAA batteries can be replaced at any time, making it your travel and summer essentials. Powerful Wind: This portable mini fan has a built-in powerful brushless motor, which is powerful enough to stably drive the fan blades to rotate at high speed to generate strong wind; Simply press the power button to the strong wind.