Nintendo DSi Handheld Console (Black)
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Marc Nix (March 23, 2007). "The Future of PlayStation Portable". IGN. Fox Interactive Media. Archived from the original on February 21, 2009 . Retrieved November 2, 2011. Owen Good (March 28, 2017). "PSA: Nintendo closing DSi Shop this week". Polygon. Vox Media. Archived from the original on March 31, 2017 . Retrieved May 26, 2019.
DS Games - Nintendo Life All DS Games - Nintendo Life
James Orry (October 13, 2009). "Hair Salon is the first DSi-only game". VideoGamer.com. Pro-G Media. Archived from the original on January 7, 2010 . Retrieved January 21, 2014. a b c d e Craig Harris (October 7, 2008). "DSi: Just the Facts (And a Little Speculation)". IGN. Fox Interactive Media. pp.1–3. Archived from the original on March 17, 2009 . Retrieved November 19, 2009.Sarju Shah (April 3, 2009). "Nintendo DSi Hands-On". GameSpot. CBS Interactive. p.1. Archived from the original on May 27, 2010 . Retrieved September 25, 2009.
Nintendo DSi review | Den of Geek
Yui Ehara, designer of the DS Lite and DSi's original casing, had to redesign the revised case.  He advocated changing the six speaker apertures, as their circular perforations were redundant to the rest of the handheld's interface. He believed that this alteration also signaled a clearer distinction between the DSi and its predecessors while keeping the unit "neat" and "simple".  Ehara hoped the DSi's added features would not interfere with his desired iconic image of the Nintendo DS product line: two rectangles, one on top of the other, with each half containing another rectangle inside.  This model was publicly revealed at the October 2008 Nintendo Conference in Tokyo, along with its Japanese price and release date.  While the DS product line's worldwide yearly sales figures consistently surpassed those of its primary market rival, Sony's PlayStation Portable,    demand for it in Japan was decreasing; Nintendo's launch of the DSi was intended to stimulate sales. The company was less concerned with releasing the DSi in other territories, where DS Lite market demand remained high.  
An SD memory card can be inserted into DSi, and it can be used for both the camera and audio player functions. To make use of Nintendo DSi Sound, you will need to store sound data in the AAC format on an SD card. As for the Nintendo DSi Camera, if you have stored its pictures on an SD memory card, you can view them on Wii by using its Wii Photo Channel. The Nintendo DSi's design is similar to that of the second DS iteration, the Nintendo DS Lite.  It is approximately 12 percent shorter (0.10 inches (2.5mm)) than the Nintendo DS Lite when closed, but slightly wider and lighter.   The DSi has two 3.25-inch (83mm) TFT-LCD screens—.25 inches (6.4mm) larger than those of previous models —that are capable of displaying 262,144 colors.  The touch sensitive lower screen accepts input from the included stylus. The handheld features four lettered buttons (X, Y, A, B), a directional pad, and Start, Select, and Power buttons. Two shoulder buttons, a game card slot, and a power cable input are placed under the console's hinge.  The included AC adapter (WAP-002) is not compatible with any previous DS model.