Unlock peak performance and gain deep insights into your daily recovery with the Amazfit Helio Ring. Designed for athletes and wellness enthusiasts, this premium smart ring offers a discreet yet powerful way to monitor your health. Crafted from durable titanium alloy with a comfortable resin inner layer, it's exceptionally lightweight and slim (only 2.6 mm thick). The Helio Ring accurately tracks key metrics including heart rate, blood oxygen (SpO₂), sleep stages (including REM and deep sleep), HRV, and EDA for stress monitoring. Receive a daily readiness score to guide your recovery, all conveniently accessible through the Zepp App. Enjoy up to 4 days of battery life on a single charge, with quick wireless charging taking approximately 1 hour and 40 minutes. The ring is water-resistant up to 10 ATM, making it suitable for all activities. Product Summary: Amazfit Helio Ring, smart ring activity tracker, titanium, size 8, heart rate monitor, blood oxygen sensor, sleep tracking, stress monitoring, 4-day battery life, 10 ATM water resistance.