1)Fan can be powered by USB cable or battery 2)Remove flexibly 3)No noise 4)Good air-cooling, healthy ... ,eco-friendly Mini tower fan,USB mini fan,desktop usb tower fan ... operated, with common motor, oscillating function1) Power supply: USB line 2) Power: 2.5W, 500 mA, AC: ... 100-240V/50-60Hz DC:5V3) Material: ABS 4) Plug the USB line(included) into the fan and into an ...