Question: Information: - The is a dual-screen handheld game console released by Nintendo. The console launched in Japan on November 1, 2008, and worldwide beginning in April 2009. It is the third iteration of the Nintendo DS, and its primary market rival is Sony's PlayStation Portable (PSP). The fourth iteration, entitled Nintendo DSi XL, is a larger model that launched in Japan on November 21, 2009, and worldwide beginning in March 2010. Development of the DSi began in late 2006, and the handheld was unveiled during an October 2008 Nintendo conference in Tokyo. Consumer demand convinced Nintendo to produce a slimmer handheld with larger screens than the DS Lite. Consequently, Nintendo removed the Game Boy Advance (GBA) cartridge slot to improve portability without sacrificing durability. - Brain Age Express ( known in Japan as Chotto Brain Training and in Europe and Australia as A Little Bit of ... Dr Kawashima 's Brain Training ) are three educational puzzle video games developed by Nintendo for the Nintendo DSi 's DSiWare download service . They are the third series of games in the Brain Age series , and are repackaged versions of both Brain Age : Train Your Brain in Minutes a Day ! and Brain Age 2 : More Training in Minutes a Day ! games , featuring both old and new puzzles . There are three editions : Arts & Letters , Math , and Sudoku . The Arts & Letters and Math versions were originally released on December 24 , 2008 in Japan as launch titles for the DSiWare service , and the Sudoku edition on April 22 , 2009 in Japan as well . The Math edition is the only version currently available outside Japan , and was released on April 5 , 2009 in North America and June 19 , 2009 in the PAL regions , as a launch title for the service . However , the Arts & Letters edition was released on August 10 , 2009 in North America and October 23 , 2009 in the PAL regions . The puzzles featured in both the Literature and Science editions were created by Ryuta Kawashima . One puzzle in each of these two editions utilizes the Nintendo DSi 's camera function , while both versions allow players to use a photo for their in - game profile . On June 19 , 2015 , Brain Age Express : Sudoku was pulled from the DSi Shop and 3DS eShop , with no official reason given . - The or simply, DS, is a 32-bit dual-screen handheld game console developed and released by Nintendo. The device went on sale in North America on November 21, 2004. The DS, short for "Developers' System" or "Dual Screen", introduced distinctive new features to handheld gaming: two LCD screens working in tandem (the bottom one featuring a touchscreen), a built-in microphone, and support for wireless connectivity. Both screens are encompassed within a clamshell design similar to the Game Boy Advance SP. The Nintendo DS also features the ability for multiple DS consoles to directly interact with each other over Wi-Fi within a short range without the need to connect to an existing wireless network. Alternatively, they could interact online using the now-closed Nintendo Wi-Fi Connection service. Its main competitor was Sony's PlayStation Portable as part of the seventh generation era. What is the relationship between 'brain age express' and 'microphone'?
Answer:
input device