Break your limits with the Amazfit Helio Ring.. Find all your training and recovery data recorded by your Amazfit smartwatch and. Helio Ring, all gathered in the Zepp App. Recovery metrics from both devices are. merged to enhance accuracy. DESIGN. - Build: High-quality titanium alloy that is skin-friendly, durable, comfortable, and. extremely lightweight. - Water Resistance: 10 ATM. - Battery: Fast wireless charging. Up to 5 days of battery life. - Sizes: Currently available in 3 sizes (08, 10, and 12). TRAINING. - Metrics: VO2 Max, Recovery Time, Training Effect, and Training Load. - Sensor: The self-developed BioTracker™ PPG optical sensor enables 24-hour. precise tracking of heart rate, blood oxygen, and EDA (Electrodermal Activity) during. exercise. EDA can detect physical indicators such as sweaty palms, fever, or stress. - Apps: Sync and share data with adidas Running, Strava, komoot, Relive, Google. Fit, and Apple Health. - Performance Prediction: Check your potential race performance for 3KM, 5KM,. 10KM, Half Marathon, and Marathon. - Sport Modes: Walking, Running, Cycling, and Treadmill. RECOVERY. - All-in-One: Easily check all your recovery data compiled in a Recovery summary. at the top of the Zepp App homepage. - Sleep: Monitor sleep quality, including deep, light, and REM sleep phases as. well as daytime naps and breathing quality. - Readiness: Tracks your mental and physical recovery, giving you a score each. morning to help you understand your condition. - Heart Rate Recovery: See how long it takes your heart rate to return to resting. levels within 3 minutes after exercise.