Back in the day, there was no such thing as a wireless controller for the SNES, NES, N64 or the SEGA Saturn games machines. However, that all changes with this cool mod by ericmerl on Imgur. Apparently this is a really easy mod to complete, so that makes it all the more easier to decide that this is thing to do and finally you are able to sit back to play those retro games, rather than being bent over the monitor for hours on end.
Here is a little bit of text to give you an idea on what this project is all about;
Original SNES controller, now modded to be wireless. This is not my design! For the original schematic (as well as similar designs for NES, N64, and Sega Saturn)