I still have mine, don't use it anymore though. It brings back so many memories of growing up as a kid. Hours and hours playing in front of the TV and mom begging me to stop so I could to eat :)
What it did was to simplify everything when you wanted to video games (the old nintendo ones) so you can change from TV to video games when you wanted to play and make it easy without having to plug or unplug cables. Remember?
SHARE if you knew what it was and if you enjoy to remember the good old days :)