Circular brings mobile payments to its 3 Series smart ring
Circular's smart ring gets NFC and a haptic motor to go with its one-line ECG.
Circular's smart ring gets NFC and a haptic motor to go with its one-line ECG.<p><img src="https://www.engadget.com/img/gallery/circular-brings-mobile-payments-to-its-3-series-smart-ring/intro-1787060503.jpg" /></p>
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