Inside a NES Cartridge sits a NOAC (Entire NES and 99 games on a chip), speakers, all standard buttons, and an LCD screen. It took about a month to build, a few battle scars, but it looks pretty excellent. View more about the build and discuss it here. For more portable console fun, be sure to check out the rest of Ben Heck’s site. In case you’ve been living under a rock the last five years or so, he has been turning consoles into laptops and handhelds for years. Below is the on off switch, and hole in the back for the speaker.