Mini USB fan with the metal case 1)Ultra-quiet fan ... free angle use,great materia Mini USB fan with the metal caseFeatures1.2300RPM speed,96mm blade diameter, new ... be 25000~30000 hours, can be used continuously with long time. 5.Fashional and novel shape, noble ... and elegant. 6.Fan is with control switch, its angle can be adjusted up ... length: 1.2MPictures Mini USB fan with the metal case