... ,quiet&cooling wind 3)Long using life Battery and USB powered mini desk fan 1.1700RPM,3.1m/s wind speed,150mm blade ... of metal,bring simple sense of beauty and quality. 6.Fan is with control switch, two speed choices, pitch angle is adjustable ... weight:535g,easy to carry. 8.Fan occupies small room, stable structure, can be placed on table or hanging. 9.Appearance delicate ...