The Nintendo DS was a wildly successful console, but emulating its unique dual screen design on modern handhelds is a challenge. The Retroid Dual Screen Add-on is currently available through the company’s online store in black, purple (inspired by the GameCube), and translucent white color options for $69, but are currently sold out. The secondary screen simply clamps onto handhelds, but it’s not compatible with Valve’s Steam Deck. But since Retroid’s Dual Screen Add-on is at its core just an external display for a handheld, what games you can play and how the screen will be utilized is left to the device’s operating system or the emulator you’re using. The screen connects to modern handhelds using a USB-C port that supports DisplayPort.