A Momentum Commerce researcher said the slow start could indicate “evolving consumer behavior” after Amazon doubled the length of its Prime Day sales.

Some of our favorite gadgets, home goods, tools, and more are deeply discounted during Amazon's annual Prime Day sale.

In honor of Prime Day, Amazon is going against the norm with the first-ever price cut on Oura Ring 4: With a 15% reduction on all sizes, you can now buy the Oura Ring 4 in silver, size 10, for $297 from $349. Other sizes are also on sale, but some of them are already sold out.