Amazon Echo Dot

AP

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1,006.51 12.75 (+1.30 %)

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Americans are on the cusp of a radical shift in how they shop.

On Tuesday, the Echo Dot, Amazon’s voice-controlled speaker that’s powered by artificial intelligence, took the crown as the best-selling item on Amazon’s Prime Day.

And on Wednesday, communication firm Walker Sands published a report that revealed just how much the Echo and other voice-controlled devices could revolutionizing shopping.

According to Walker Sand’s…