little fan usb mini fan 5-inch 6-inch 8-inch desk fan desktop student office desktop little fan 小风扇USB迷你风扇5寸6寸8寸台扇桌面学生办公室台式小风扇

color classification

[5-inch dark blue] first gear [5-inch black] first gear [5-inch sky blue] first gear [5-inch orange] first gear [5-inch white] first gear [6-inch dark blue] second gear [6-inch sky blue] second gear [6-inch orange] second gear [6-inch white] second gear [8-inch deep blue] second gear [8-inch sky blue] second gear [8-inch orange] second gear [8-inch white] second gear