Released in November 2004 (N. America) by Nintendo, the Nintendo Dual Screen built on the technology used by the Game Boy. The key features of this handheld included two screens (as the name implies), with the bottom screen acting as a touch pad. The X and Y buttons were also added to the control layout, and this system is also the first to implement built-in wireless multiplayer capabilities. Games are stored on tiny "game cards" that are about half the size of the cartridges used for the Game Boy Advance, and are capable of more than 64-bit quality graphics.