The Nintendo 3DS was a popular handheld console known for its signature feature: a top screen that displayed 3D graphics without glasses, using autostereoscopy, adjustable via a depth slider, alongside a bottom touchscreen, stylus, and backward compatibility with DS games. It introduced a circle pad for analog control, motion sensors, and unique social features like StreetPass and SpotPass for local/online content exchange, becoming a major success despite initial price cuts and variations like the 2DS and 3DS XL.