... 2400RPM speed,96mm blade diameter, blades can be metal or plastic on your options,new DC brushless motor ... 5V USB(cable length:1.2m) power supply, metal shell, special mesh enclosure design, all has been ... continuously with long time. 5.Fashional and contracted metal style, noble and elegant. 6.Fan is with ... box):390g,easy to carry. 8.Fan occupies small room, stable structure, easy to place. 9.Appearance ...