... be metal or plastic on your options, new DC brushless motor,strong wind, super mute3.5V USB power ... painting or plating , safe.4.New generation of DC brushless technique,lower runing voltage and current, power just ... 2.1W, energy saving.5.Fan's life can be 25000~30000 hours,can be ... Fashional and contracted style, noble and elegant.7.Fan is with control switch,its angle can be adjusted ...