This is the original Game Boy Pocket Printer from Nintendo (Model No. MGB-007), launched in 1998. It was used to print images and graphics directly from Game Boy devices (such as Game Boy Pocket, Game Boy Color, and Game Boy Advance) when connected via the special Game Boy Link Cable from the EXT.IN port. The printer uses thermal printing without the need for ink and operates using 6 AA batteries (or a DC 9V 5.5W power adapter).