Nintendo Wii Sensor Bar
Each Wii console comes with a sensor bar that is plugged into the back of the Wii console and sits either above or below the television, ready and waiting to help track where you're pointing the Wii Remote and breathe life into motion controlled games.
How to I set up the sensor bar?
All you have to do is put the sensor bar's red plug into the red port on the back of the Wii console to connect the sensor bar. Then, simply place the sensor bar either above or below the television. Turn on the Wii console, click on "Wii" on the bottom-left corner, then click "Wii Settings." Press the (+) button to get to page two of the Wii Settings menu, and select "Sensor Bar," then "Sensor Bar Position." You may now choose "Above TV" or "Below TV" and then select "Confirm."
Does the Nunchuk require any batteries?
The sensor bar will work great at either the top or bottom of the television. Just make sure that you follow the instructions for setting up the sensor bar.