Good working system the only thing it is missing is the light gun. I've tested it with two-player on Tetris and both controllers work fine. It can run off four AA batteries or use the included AC power supply.
This one does have the cartridge slot on the back although I haven't tested it.
King of Fighter
Binary & Land
Donkey Kong 2
Lode Runner 2
Clu Clu Land
Milk & Nuts
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