[4000 mAh Battery] The mini fan has a built-in 4000 mAh large capacity battery for longer battery life; The USB fan provides a Type-C charging port, which is compatible with all USB output devices, making charging more convenient. [Five-Speed Wind Speed] The small fan It simulates the design of the air outlet of the aircraft engine, and the wind speed is strong and powerful. New upgrade, five gears of wind speed adjustment: first gear: sleep the wind; second gear: natural wind; third gear: refreshing wind; fourth gear: refreshing wind; fifth gear: circulating wind. [LED display] The power of the LED display is displayed in real time, which is very convenient to use; The silent fan is preferably a brushless DC motor, which effectively reduces friction noise, high speed, low noise, and runs smoothly and quietly. [Mesh Cover Removable] The front mesh cover of the portable fan is designed with a rotary button, which can be removed by rotating counterclockwise, which is more convenient for cleaning; Take out the aroma diffuser and place it in the card slot in the middle of the mask, and the air outlet will bring the fragrance to every corner. [Three-in-one design] Hanging neck fan + fan desktop + hand fan. It can be installed with a lanyard and can be easily worn all day long; 90 base + folding design is convenient to place on the desktop; The design of the hand fan is suitable for various occasions.