The NES Satellite was a Nintendo Entertainment System accessory created by Nintendo, and was released in 1989. The Satellite allowed up to four players to play the NES anywhere in the room without the necessity of wires running from the NES all the way to the players. A small infrared receiver plugged into the two controller ports on the front of the NES. The main Satellite unit, powered by 6 C-cell batteries, must have a line of sight to the receiver. The unit had four controller ports which could accommodate any type of wired NES controllers. The unit included "Turbo" selectors for both the A and B buttons. A similar product called the NES Four Score was released a year later, although it didn't allow wireless play.