Until now, Wii could not be connected to an HDTV via the HDMI
How This Works
The Wii HDMI adapter plugs directly into your Wii's cable port (the same port you use to connect the Wii video cable that is included with the Wii). After you have plugged it into this port, you will have an available HDMI port. You will also need to purchase an HDMI cable if you don't have one already.
This adapter creates a super-accurate, rich and vibrant 480p reproduction of your Wii's video signal. For the best performance, make sure your Wii's video output setting is switched to 480p (also called "Enhanced Definition" in your Wii Resolution settings). This will double the average refresh rate of your pixels and deepen the colors.
The Wii to HDMI adapter includes an audio break-out port that allows you to send stereo audio to another audio device of your choice (like an audio receiver). The port is in the form of 3.5mm stereo port.
Handles Both Audio and Video through HDMI Too
Since HDMI is an audio/video signal, this device rises to the task and handles both through the HDMI port. This conveniently allows you to run a single cable to your TV unless you wish to break the audio out separately using the adapter's break-out 3.5mm port.