When the Game Boy Advance SP came out almost 15 years ago, it was pretty much as small as portable video game consoles got. Now, it’s making an unofficial return as the model for Keymu, an open source invention developer c.Invent that’s like a miniature Nintendo Game Boy, so small it can fit on a key chain.
Keymu measures in at 42 x 46 x 17mm, and as such is believed to be the smallest emulation console ever built. It’s outfitted with a 1.5-inch OLED display and interestingly enough, it has four control buttons, two more than the original Advance SP had.
Keymu won’t be found at any electronics store near you any time soon, but you can see how to make your own if you’re into such things at the product’s Hackaday listing right here, and if you just want to see such a wondrous thing for yourself, you can check it out in the video below: