Which product holds the Guinness World Record for the fastest-selling consumer electronics item, selling 8 million units in its first 60 days on the market?

The Guinness World Records has documented some incredible retail achievements throughout history. From the largest stores to the most customers served in a day, retail businesses have pushed boundaries in remarkable ways. This trivia question focuses on a famous retail product that broke a significant world record. Test your knowledge about extraordinary retail milestones that have shaped consumer history!

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Apple iPhone (first generation)
Microsoft Kinect for Xbox 360
Sony PlayStation 2
Nintendo Wii