Circular announces smart ring Ring2: equipped with electrocardiogram and atrial fibrillation detection, and will be launched soon

At the 2025 CES exhibition, smart ring manufacturer Circular officially announced the launch of its next-generation product, Circular Ring 2. This ring not only has an electrocardiogram (ECG) function, but is also equipped with an FDA-approved atrial fibrillation (AFib) detection function. Helping users monitor heart health in real time. The wearable is expected to be available in February or March for $380.

The ECG function of Circular Ring2 is combined with an advanced PPG (photoplethysmogram) sensor to record the electrical activity of the heart through a single-lead ECG. The PPG sensor works by shining light on the skin to measure changes in blood flow, thereby providing users with accurate heart health data.

Compared with its predecessor, Ring2 has undergone a number of upgrades. The most significant change is the improvement in battery life, with official promises of up to 8 days of battery life. In addition, the new ring is equipped with enhanced sensors to effectively track key health indicators such as sleep, and the accompanying app has been redesigned to provide a smoother and more intuitive user experience.

The launch of the ring marks the launch of Circular's new smart ring with enhanced functionality, three years after competing against competitors such as Oura and Ultrahuman. Amaury Kosman, CEO of Circular, said in the launch: "With Circular Ring2, we are redefining the concept of a smart ring - combining advanced health technology with timeless design and unparalleled durability. This is more than just a piece Wearable device; it’s a statement piece that empowers our users to take control of their health without sacrificing style.”

Ring2 offers four color options: gold, silver, black and rose gold. At the same time, users can access the digital ring size function through their smartphones to accurately select the right size before placing an order. The new ring will be launched in many countries and regions including the United States, Britain and France, further expanding its market influence.