The Wii is a game system designed by Nintendo. The system launched on November 19, 2006. The Wii is notable for including a motion controller, the Wii Remote. Another notable feature is the Wii Menu, which displays software titles, or "channels" installed on the system, similar to a grid of television screens. The Wii has an SD card slot as well as USB ports, which are the primary methods for installing and accessing custom content on the system, such as the Riivolution channel and Custom Tracks for Mario Kart Wii. The original Wii model retains backward compatibility with Nintendo GameCube controllers, games, and memory cards. A "Family Edition" was released in 2011 that removed GameCube compatibility.