I tested a subscription-free smart ring that rivals Oura - and it's $50 off for Prime Day
The Ultrahuman Ring Air is a well-rounded sleep and activity tracker, offering features that go head-to-head with the Oura Ring. It's seeing a 15% discount during Amazon's Prime Day.
The Ultrahuman Ring Air is a well-rounded sleep and activity tracker, offering features that go head-to-head with the Oura Ring. It's seeing a 15% discount during Amazon's Prime Day.
