The black and silver versions of the smart ring are on sale for $297, while the brushed silver and dark gray colors are on sale for $339, and the gold version is on sale for $424.

The Oura Ring 4 is now available for $296.65, down from its usual $349.

The Prime Day camera deals are already rolling in on Day 2 of the four-day sales event, and if you're after security cameras, Amazon has some strong offers lined up. Since Amazon owns both Ring and Blink - two of the biggest names in home security - it has the power to deliver some serious discounts during its sales events.

Sales are like a sugar addiction for consumers.

For this event, Amazon increased the card's welcome offer to a $250 Amazon gift card instantly upon approval.