RF signals can also become confused. They operate at different frequencies, and in order to work properly, they have to be the only frequency being broadcasted in the area. This means that if you have a cordless phone that happens to use the same frequency as the WaveBird, the signals become crossed and neither works. This can also happen if you have two or more WaveBirds being used in the same room at once.

To avoid this, good RF controllers can be programmed to work at a variety of frequencies, so if your signals do become crossed with a cordless phone, you can just change the frequency and both devices will return to normal. For the WaveBird, Nintendo has equipped it to use one of sixteen programmed frequencies, which means that you can literally have sixteen WaveBirds in use within the same room and not have to worry about any of them going haywire unless someone walks in with a cordless phone.

As an added bonus, they've designed it so that you yourself can set the frequency number. Other RF controllers I've played with were designed to "self-scan" and pick the frequency itself. In an area full of RF devices, you could spend an hour waiting for it to scan, test to see if it worked, scan again, test, scan again, etc. Again, Nintendo made the perfect choice.

Originally posted by RoQuEr
The wavebirds stop working every time the phone rang, or somebody was on the phone. Thats plenty reason for me to stick to wired.