Nintendo Super Game Boy
  Japanese Super Famicom version

This is a great little piece known as the "Super Game Boy." It would allow play of all original GameBoy games onto yout television through the use of your Super Nintendo (Super Famicom) game system. Here you see it complete in the original box with all documentation . It included a nice little plastic card as the manual. It was introduced to market in 1994. It was basically the first and only way to play Gameboy games in color until Nintendo released the "GameBoy Color" units.  These Japanese Super Game Boy adapters generally sell for $100+ complete in the collectors market. The Japanese version is harder to find since we are in the USA.