What You Need to Connect the Wii U to the Internet
A broadband Internet connection. A cable, ADSL, or fibre-optic Internet connection is recommended.
A wireless router or a Wii LAN adapter. Most people already use a wireless router at home to connect computers and other devices to the Internet.
The Wii U is compatible with the 802.11n, 802.11g, and 802.11b wireless standards.