lumthou Smart Ring - Free Heart Rate SpO2 Sleep Tracker | No Subscription | IP68 Waterproof Fitness Tracker | 24/7 Activity Monitor | Step Counter & Stress Tracking | Sleep & Workout (Black, 11) — Open-Box, 38% Off

📝 【7 Health Metrics. Precision Monitoring】：Your health insights at your fingertips. Precisely tracks heart rate, blood oxygen (SpO2), heart rate variability (HRV), stress levels, period prediction, activity status, and skin temperature trends. You can easily set automatic checks every 30 minutes in the app to continuously log your health data trends and empower your wellness journey. 🚴‍♂️【 12 Professional Sports Modes. Smarter Workouts】：From the gym to the trails, it's your ultimate workout partner. Features 12 dedicated modes like running, cycling, swimming, yoga, weightlifting, hiking, and badminton. Automatically detects your activity and precisely tracks duration, calories burned, and heart rate zones—delivering performance data like a personal coach. 🌙 【Advanced Sleep Coaching. Wake Up Refreshed】：Understand your sleep to transform your mornings. Our multi-sensor algorithm automatically analyzes your deep, light, and REM sleep stages to provide a personalized sleep score and improvement insights. Wear it consistently to discover your patterns and optimize your routine for true recovery. 💎 【Smart, Slim, & Seamlessly Comfortable】：Crafted with skin-friendly stainless steel and an epoxy resin inner layer, it delivers a lightweight and comfortable wearing experience. It also supports gesture control for taking photos and switching music tracks, freeing your hands effortlessly.Smart Data Sync: Even when Bluetooth is disconnected, the ring can still store data for a period of time — it will automatically sync immediately once reconnected, ensuring no data loss.Additionally, it features an IP67 water-resistant rating. A 2-hour charge provides up to 5 days of battery life, and when paired with the charging case, it can be recharged an additional 4 times. ✅ 【Zero Subscription. Total Peace of Mind】：All core health features are free for life—no subscriptions. You own your data. Note: Connects via Bluetooth (33 ft range). If disconnected, it requires a quick manual reconnect in the app. Backed by a 30-day risk-free guarantee and a global app in 30+ languages that syncs with Apple Health & Google Fit. Product Overview: This smart ring is your ultimate health and fitness companion, integrating multiple precision sensors to provide accurate health monitoring and activity tracking. Crafted with hypoallergenic stainless steel and epoxy resin inner layer, it's lightweight and comfortable for all-day wear. Key Features: Comprehensive Health Monitoring: Precisely tracks seven key health metrics: heart rate, blood oxygen saturation (SpO2), heart rate variability (HRV), stress levels, period prediction, activity status, and skin temperature trends. Set automatic checks every 30 minutes in the app to continuously log your health data trends. Multiple Sports Modes: Features 12 professional sports modes including running, cycling, swimming, yoga, weightlifting, hiking, and badminton. Automatically detects activities and tracks duration, calories burned, and heart rate zones. Scientific Sleep Analysis: Utilizes multi-sensor fusion algorithm to analyze deep sleep, light sleep, and REM sleep stages. Provides personalized sleep score and improvement insights. Smart Interaction & Data Sync: Supports gesture control for hands-free photos and music control. Features Data Sync Assurance - stores data locally when disconnected and resyncs automatically upon reconnection. Long Battery Life & Protection: Offers up to 5 days battery life with IP67 waterproof rating that protects against sweat, rain, and swimming. Product Information: Connection: Bluetooth (33 ft/10m range, requires manual reconnect if disconnected) Battery Life: Up to 5 days Waterproof Rating: IP67 Monitoring Functions: 7 health metrics Sports Modes: 12 professional modes Data Sync: Apple Health & Google Fit compatible APP Support: 30+ languages Purchase Assurance: All core health features are free for life - no subscriptions. Backed by 30-day risk-free guarantee.