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You can add wireless controller support to the NES through its unused expansion port
Modernize your NES.
The NES Hub simply snaps into the expansion port and is designed to perfectly sit hidden inside the cutouts under the console. When connected to a PC over Bluetooth instead of a controller, the NES Hub offers a web-based configuration tool through Google Chrome. You can remap controls and buttons and even switch to a keyboard and mouse mode if you think that will somehow give you an advantage when playing Super Mario Bros.
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