Wii USB fan is designed to reduce the temperature of your Wii. It can improves performance and minimize wear of your Wii console. Installed the USB fan to your Wii console and keep the switch in the “on” position, then the LED red light is on.The quiet yet powerful fan can accelerate the air circulation in the console system, prevent the console from over-heat to prolong the Wii’ s life.You can transfer data by the USB port on the fan. So it doesn’ t affect USB port function of the Wii console.