 Both the official NES 2 and the FC Twin capitalize on the card slot reader's greater reliability; games rarely suffer from bad connections as they did with the original ZIF socket.The FC Twin console uses SNES compatible controllers and devices such as the Super Scope, Konami Justifier and the SNES mouse, but cannot use NES compatible controllers and devices.Qi Sheng has its own version of the NES Zapper which is compatible with games that require use of the NES Zapper.