... life 3.Color choosable,excellent workmanship Desk portable super mute PC USB DC brushless cooler desk fan Power source plug: USBMaterial: MetalMeas ... ,new DC brushless motor, strong wind, super quiet. 2.5V USB(cable length:1.2m) power supply, metal shell, special mesh ... wind, cool and refreshing, comfortable. 11.USB plug and play,no external power needed,USB power adapter required for the 5V .. 1000MA ...