1)Fan can be powered by USB cable or battery 2)Remove flexibly 3)No noise 4)Good air-cooling, healthy, ... , 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 ... (battery not included) 13 inch Mini USB table tower fan, 2.5W ABS material