According to Circular, the Ring 2 will measure blood pressure using Pulse Transmit Time (PTT), which refers to the amount of time it takes for your blood through your arteries. For those wondering, ...

Table of Contents How blood pressure sensing works on a ring ... Touted to be the first FDA-cleared smart ring that offers an ECG measurement facility, it has also received regulatory clearance ...

Circular’s upcoming smart ring, the Circular Ring 2, will get blood pressure tracking via an OTA update in late 2025. The ring is also expected to introduce non-invasive blood glucose trend ...