USB Rechargeable: With the two built-in high-performance lithium batteries with 4200 mAh, the USB rechargeable fan can work for 6-13 hours when fully charged.This mini fan is compatible with all USB ports, so you can charge it from any USB deviceFive-speed adjustable and one-button design: the small fan has been innovatively upgraded to five wind speeds to meet your demands in different occasions.In addition, with the one-button design, you can switch between different wind speeds by pressing the button and stop it by long-pressing the button for3 seconds LED power indicator: the folding fan is equipped with a clear digital LED display, which shows you the exact battery level and current wind speed while you work.It serves as a low battery reminder to remind you to charge this portable fan in timeFast cooling and removable fan guard: The USB fan has a 5-blade design that maximizes airflow for a cooler, gentler breeze.In addition, the removable fan guard ensures that you can easily clean the fan to prevent allergies caused by dust accumulationLow Noise and Portable: The high-quality pure copper motor effectively reduces frictional noise and provides strong wind with lower noise.The rechargeable USB fan weighs only 190 g and can be easily transported anytime and anywhere Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.