... 3.Size:15x10x15.5cm,easy to place MOQ:400PCS. 4 inch latest cooling fan(USB port fan)Power source plug: ... done by painting or plating,safe. 3.New generation of DC brushless technique, lower running voltage and current, power ... just 2.1W, energy saving. 4.Fan's life can be 25000~30000 hours, can ... ,black,white,red(Other colors require MOQ400PCS). 4 inch latest cooling fan(USB port fan)