Fan can be powered by USB cable or battery Remove flexibly No noise Good ... line operated, with common motor, oscillating function1) Power supply: USB line 2) Power: 2.5W, 500 mA, AC:100 ... -60Hz DC:5V3) Material: ABS 4) Plug the USB line(included) into the fan and into an laptop ... 6cm 1set included: USB cable+tower fan+manual(battery not included) Air cooling fan,USB tower fan,table electronic tower fan, ...