Mini USB fan with the metal case 1)Ultra-quiet fan for office ... materia Mini USB fan with the metal caseFeatures1.2300RPM speed,96mm blade diameter, new DC brushless motor, strong wind, super quiet. ... exquisite, can be used in any occasion. 10.Sofe wind, cool and refreshing, comfortable.Specifications Power source plug: USBMaterial ... 1±0.25WCable length: 1.2MPictures Mini USB fan with the metal case