Gameshark authentic for gameboy advance

Product Name: Gameshark authentic for gameboy advance
Item is a mint condition GameShark. Tested and works. Uses 8 authentic digit codes. If you're unfamiliar with what a GameShark does, it uses codes you can acquire online to get extra lives, special items, invincibility, too many things to list. Each gameboy advance game has different stuff you can do and essentially can help you finish the game easily. Does not come with gameboy or game, this is only for the game shark.