1. 6 inch metal fan, mini model 2.Weight(without box): 416G, portable 3.power just 2.25,energy saving 4.DC brushless motor ... , aluminum blades ,new DC brushless motor, strong wind, super quiet.2.5V USB(cable length:1.2m) power supply, metal shell ... DC brushless technique, lower running voltage and current, power just 2.25W, energy saving.4.Fan's life can be 25000 ...