... Color choosable,excellent workmanship Desk portable super mute PC USB DC brushless cooler desk fan Power source plug: USBMaterial: MetalMeas(with ... : 1.2100RPM speed,145mm blade diameter, aluminum blades ,new DC brushless motor, strong wind, super quiet. 2.5V USB(cable length: ... by painting or plating, safe. 3.New generation of DC brushless technique, lower running voltage and current, power just 2. ...