Pobovi Smart Ring - Health Sleep Tracker, Continuous SpO2 Heart Rate Monitor, Stress Management, NFC Wireless Charging, 6-Day Battery, Water-Resistant(IP68), iOS Android Compatible, Silver, size 7 Comprehensive Health Tracking Monitor key metrics like heart rate, SpO2, stress, sleep quality, and activity levels with high accuracy, empowering you to take control of your health. Enhanced App Experience Seamlessly connect to iOS or Android devices via Bluetooth, unlocking detailed insights and personalized recommendations for your wellness goals. Long-Lasting Battery Life Stay powered for up to 6 days on a single charge, with an additional 18 days using the NFC wireless charging case?ideal for travel and busy schedules. Premium Comfort Durability Crafted from lightweight aerospace-grade titanium and hypoallergenic epoxy resin, the ring is water-resistant (IP68) and designed for all-day comfort. No Hidden Costs Enjoy lifetime access to the POBOVi app with no subscription fees?providing an affordable, stress-free solution for your health monitoring needs. Confirm finger size before ordering Buy with confidence. Check out our reviews. Also, happy to combine shipping to save you when you buy multiple items.