Computer fan *Work by USB line & 4AA batteries *With 6 colors to choose. *With LED light *Material: ABS USB tower fan TZ-USB280A ---new upgrade version as customer promotion request 1) Power supply: can use USB line & 4AA batteries2) 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 laptop USB5) Place the fan on a dry, level ...