The Nintendo DS and Nintendo 3DS are handheld game consoles from Nintendo. They feature cutting-edge design, a wide variety of games, and the ability to play online games. Key features: Dual touch screens; primary screen for displaying game content; touch screen for controlling games; built-in microphone; voice communication support; Wi-Fi connectivity for online gaming. Both the Nintendo DS and 3DS were hugely successful, with a combined sales of over 250 million units worldwide. These consoles paved the way for the success of Nintendo's later handheld consoles, such as the Nintendo Switch.