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Story summary
- The Oura Ring 4 is on Black Friday sale, with prices as low as $49 when paired with a $200 American Express Platinum card credit.
- Discounts vary by model, with some styles at $99 or $149, and the sale runs through December 1.
- The ring tracks sleep, fitness, and recovery, lasts up to eight days on a charge, and is praised for accuracy and a user-friendly experience.
