Circular unveils its next gen Ring 2 with ECG functionality and AFib detection at CES 2025

Smart ring maker Circular announced its next-gen Ring 2 with ECG (electrocardiogram) functionality and AFib (atrial fibrillation) detection at CES 2025 Unveiled on Sunday in Las Vegas. The wearable is set to go on sale in February or Mach for $380.

The ring’s ECG capability and FDA-cleared AFib detection will gives users the ability to monitor their heart health. The wearable can capture a single-lead ECG, which is a way of recording the electrical activity of your heart, using an advanced PPG (photoplethysmogram) sensor. PPG sensors work by shining light onto your skin to measure changes in blood flow.

Circular says the new ring comes with additional upgrades compared to its predecessor, including a better battery life; the company promises eight days. It also comes with enhanced sensors to track key health metics, including sleep analysis. The company also redesigned its companion app to allow for a more intuitive user experience.

The announcement comes three years after Circular unveiled its first smart ring to take on Oura and Ultrahuman.

“With the Circular Ring 2, we’ve reimagined what a smart ring can be—combining advanced health technology with timeless design and unmatched durability,” said Cirucular CEO Amaury Kosman in a press release. “This isn’t just a wearable; it’s a statement piece that empowers our users to take control of their wellness without compromising on style.”

The ring will be available in four finishes: gold, silver, black, and rose gold. Circular is also launching a Digital Ring Sizing feature that you can access on your smartphone before you place an order. The Circular Ring 2 will launch in multiple countries including the United States, the United Kingdom, and France.