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

The retail world is full of impressive achievements, but some product launches have broken all records in terms of sales velocity, customer demand, and market impact. This trivia tests your knowledge about the Guinness World Record for the fastest-selling consumer electronics product of all time - a milestone that revolutionized an entire industry and demonstrated unprecedented retail strategy success.

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Apple iPhone 6/6 Plus (2014)
Microsoft Kinect for Xbox 360 (2010)
Sony PlayStation 4 (2013)
Nintendo Switch (2017)