Wifi Adaptor Nintendo Wifi Usb Adaptor But No Cd Where Can I Download Software?

Nintendo wifi usb adaptor but no cd where can i download software? - wifi adaptor

So I bought my Nintendo Wi-Fi adapter in the mail, but do not come with CD and ask my computer to install the installation media CD-ROM, but does not come with a CD, if anyone knows a place where I can download the software for this? is on the ground, if Nintendo can please give me the direct link to it. Thank you!