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

In the competitive world of retail and product marketing, some product launches have shattered records in ways that made history. These launches represent pinnacle achievements in marketing strategy, consumer demand, and brand power. Test your knowledge about the most extraordinary product launches that broke world records and changed the retail landscape forever.

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Apple iPhone 6
Microsoft Kinect for Xbox 360
Sony PlayStation 4
Nintendo Switch