This first description was taken from Amazon.com: "It is a Game Boy emulator for the Nintendo 64. A N64 game is plugged
into the back of the item and a Game Boy cartridge is plugged into the
top. Like the Super Game Boy, it connects to the N64's cartridge slot
and requires a N64 boot cartridge plugged into its back, and allows you
to play Game Boy games on it. There is also a cheating device programmed
into it, called the "Golden Finger" (like the Game Genie or Game
Shark). Holding the 'L' and 'R' buttons simultaneously will cause the
game to freeze at that point and the GB Hunters' Menu to appear. The
Game Screen can be maximized or minimized, from the Main menu, allowing
the player to see the game full screen. The GB Hunters color palette can
also be changed from the menu, to view the game in a variety of the 3
different colors. Most sellers of this item, on eBay and other places
such as the EMS site itself, do not mention that the video game sounds
while being played on the GB Hunter are not emulated. Rather, users are
subjected to the theme song of the GB Hunter, which loops endlessly."