Have the effect of ventilation circulation 2200mah high capacity battery Fan operation noise is minimal There are six gears that can be adjusted Optimized through-air ducts for more powerful wind Features: 1, turbo-, lighter and more natural air delivery 2, six adjustable air volume, free to change the control at 3, no fan blade cleaning more convenient 4, low noise / energy saving, high-end appearance. Color: White Material: ABS Package Contents: 1 x fan 1 x usb data cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.