... wind, super quiet. 2.5V USB(cable length:1.2m) power supply, metal shell, special mesh enclosure design, all has been ... generation of DC brushless technique, lower running voltage and current, power just 2.1W, energy saving. 4.Fan's life can ... refreshing, comfortable. 11.USB plug and play,no external power needed,USB power adapter required for the 5V .. 1000MA 12.Personalized different colors ...