R04 Smart Ring for Men & Women with Charging Case – Health & Sleep Monitor (SpO2 Heart Rate) 5ATM Waterproof Multi-Sport Mode Camera Control – Fitness & Activity Tracker Ideal Gift for Birthday/Anniversary

Metal. Item Type: Smart Ring. Waterproof Grade: 5ATM. Model Number: R04. Activity Tracked: Activity Tracker, Steps Tracker, Distance Tracker, Calorie Tracker. Metrics measured: Heart Rate Monitor, Sleep Monitor, Blood Oxygen Monitor, Stress Monitor. Item Weight: About 3.6g. Case Material: STEEL. Certification: ce, FCC. Battery Capacity(mAh: 15mAh 7 8,18mAh(9 13. Charging Case: 200mAh. How to measure the size: STEP 1: Take a long non-elastic rope or paper, and wrap it around your finger. STEP 2: Make the rope or paper fit closely to your fingers to avoid being too loose or too tight, which may cause size deviation. STEP 3: Mark the junction part on rope or paper. STEP 4: Lay the rope or paper flat, and measure the length. It is recommended to measure multiple times for more accurate data. The Future of Health at Your Fingertips. Fitness, Stress, Sleep, and Health Smart Ring. Usher in a New Era of Gesture Control!. Fitness, Sports, Sleep Wellness. Precision Sensor Monitoring Technology.