Mini USB fan with the metal case 1)Ultra-quiet fan for office 2) ... Portable,free angle use,great materia Mini USB fan with the metal caseFeatures1.2300RPM speed,96mm blade diameter, new DC brushless ... exquisite processing, safe. 3.New generation of DC brushless technique, lower running voltage and current, power just 2.1W, energy saving ... ±0.25WCable length: 1.2MPictures Mini USB fan with the metal case