: 18.8*9*4.65cm [3000mAh Battery] The mini fan has a built-in 3000mAh large capacity battery for longer battery life; USB fan provides Type-C charging port, compatible with all USB output devices, making charging more convenient.Five-speed Wind SpeedThe small fan simulates the design of the aircraft engine air outlet, and the wind speed is strong and powerful. Five gears of wind speed adjustment: first gear: sleeping wind; second speed: natural wind; third gear: refreshing wind; fourth gear: fresh air; fifth gear: circulating wind. [LED display] The power of the LED screen is displayed in real time, which is very convenient to use. the quiet fan is preferably a brushless DC motor, which effectively reduces friction noise, high speed, low noise, and operates smoothly and quietly. [Removable Mesh Cover] The front mesh cover of the portable fan is designed with a rotary knob, which can be removed by rotating counterclockwise, which is more convenient for cleaning; Take out the aroma diffuser and put it into the card slot in the middle of the mask, and the air outlet will lead the aroma to every corner. [Three in one design] Hanging neck fan + desk fan + hand fan. It can be installed with a lanyard and can be easily worn all day; the base + 90 foldable design is convenient to place on the desktop; the hand fan design is suitable for various occasions.