strong wind fan 1.metal shell,aluminum blade,USB port 2. ... blade diameter,new DC brushless motor,strong wind,low noise2.5V USB power supply,new environmental material,special mesh enclosure ... 5.Fashional and contracted style, noble and elegant.6.Fan is with control switch,its angle can be adjusted up ... ,can be used in any occasion.10.Sofe wind,cool and refreshing,comfortable. mini USB strong wind fan