Was confused as to why this didn't work with my normal router. (normal for 2019) Perhaps I need the "wifi N" adapter, but I didn't find the product listing or specs online helpful in solving this compatibility issue.
If you only need to connect your 360 to the internet temporarily to download a few things, and dont have direct access to your router, I'd recommend an alternative. Try tethering wifi from a laptop LAN port into the back of the 360.Worked great for me and saved some $.