GoKawiilOura Ring 4 Ceramic Midnight hits $279 on Amazon, matching record low
Amazon is selling the Oura Ring 4 Smart Ring in Ceramic Midnight for $279, down from its $399 list price, a 30% discount that matches the lowest price it has ever hit. The ring tracks sleep, recovery, activity, heart rate, temperature and stress without a screen, using Oura's Smart Sensing technology, and the ceramic version is built from scratch-resistant zirconia ceramic with a battery life of roughly 5 to 8 days.