Amazon sold 'tens of millions' of Alexa devices this holiday season

'The Cyber Guy' Kurt Knutsson explains on'Fox & Friends' Amazon's smallest smart speaker turned out to be its biggest hit this holiday season, selling more than any other product among all manufacturers. The diminutive Dot sold in its "millions," the ecommerce giant revealed on Tuesday, though as usual the company declined to offer a specific number. It's sold out, too, and won't be in stock again until January 2, according to its product page. "Echo devices have been an extremely popular gift this year," Amazon said in reference to its growing line-up of smart speakers that besides the Dot also includes the updated Amazon Echo, the larger Echo Plus, and the Echo Spot. The hands-free, voice-controlled devices let you communicate with Alexa, the built-in virtual assistant that allows you to request information, play music from your library, make calls, listen to audiobooks, control smart home devices, and more.