... wind 3)Long using life Battery and USB powered mini desk fan1.1700RPM,3.1m/s wind speed,150mm blade diameter ... and current, power just 2.1W, energy saving. 4.Fan life can be 25000~30000 hours, can be used continuously ... 210*62*190mm,product weight:535g,easy to carry. 8.Fan occupies small room, stable structure, can be placed on table ... 25WPower cord length: 1.2M Battery and USB powered mini desk fan