Multiple outlets report that Oura Ring 4 models are discounted during Amazon’s Prime Day event. Android Authority says the Ceramic Midnight Oura Ring 4 is marked down by about 48%, with the ring available for a substantially lower price during the event. Business Insider similarly reports Prime Day deals on Oura Ring 4, including both ceramic and metallic versions, with discounts that can reach up to 51% off depending on the selected size. Together, the coverage indicates that the Prime Day promotion applies to different finishes of the Oura Ring 4 rather than a single color or material. The reported savings vary by model and size, but both sources characterize the event as offering the largest discounts available during the sale period. The discounts are presented as temporary, tied to Prime Day pricing, and depend on availability by size and edition. No additional details about hardware changes or new features are included in the reports; the emphasis is on price reductions during the event.