The design of the controllers is similar to that of Mattel's Intellivision — the controller is rectangular and consists of a numeric keypad and a set of side buttons. In place of the circular control disc below the keypad, the Coleco controller has a short, 1.5-inch joystick. The keypad is designed to accept a thin plastic overlay that maps the keys for a particular game. Each ColecoVision console shipped with two black controllers. Extra controllers were also available in stores. The white / beige controller were sold for the Adam computer.