Circular Ring 2 will add ECG readings and 8-day battery life — at a cost

Circular is adding the first FDA-approved ECG into its next-gen smart ring, but it had to cut a signature tool to make it fit.

source https://www.androidcentral.com/wearables/circular-ring-2-will-add-ecg-readings-and-8-day-battery-life-at-a-cost