{"product_id":"r21-smart-ring-with-heart-rate-blood-oxygen-sleep-tracking-ai-health-monitor-waterproof-fitness-tracker","title":"R21 Smart Ring with Heart Rate Blood Oxygen Sleep Tracking AI Health Monitor Waterproof Fitness Tracker","description":"\u003ch3 style=\"width: 100%; height: auto;\"\u003eR21 Smart Ring with Heart Rate Blood Oxygen Sleep Tracking AI Health Monitor Waterproof Fitness Tracker\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eR21 Smart Ring with Heart Rate Blood Oxygen Sleep Tracking AI Health Monitor Waterproof Fitness Tracker\u003c\/p\u003e\n\u003ch3 style=\"width: 100%; height: auto;\"\u003e\n\u003cbr\u003eOverview\u003c\/h3\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003eSlim \u0026amp; Lightweight Design: Ultra-thin profile (2.3mm thickness) and light weight (2.7g), ensuring comfortable all-day wear without bulkiness.\u003c\/p\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003eComprehensive Health Monitoring: Tracks heart rate, blood oxygen (SpO2), body temperature, HRV, stress levels, and sleep quality for holistic health insights.\u003c\/p\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003eAI-Powered Analysis: Utilizes cloud-based AI large models to provide personalized health data interpretation and recommendations.\u003c\/p\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003eSmart Activity Tracking: Monitors steps, distance, calories burned, and supports multiple sports modes for fitness enthusiasts.\u003c\/p\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003eLong Battery Life: Offers 5-7 days of typical usage on a single charge with quick magnetic charging capability.\u003c\/p\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003eWaterproof Durability: Rated 5ATM waterproof, suitable for swimming and daily water exposure.\u003c\/p\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003eGesture Control \u0026amp; Remote Features: Supports gesture control for phone interactions, remote camera shutter, and device finding functions.\u003c\/p\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003e \u003c\/p\u003e\n\u003ch3 style=\"width: 100%; height: auto;\"\u003eSpecifications\u003c\/h3\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003eRing Sizes: Size 6 (16.5mm), Size 7 (17.3mm), Size 8 (18.1mm), Size 9 (18.9mm), Size 10 (19.8mm), Size 11 (20.6mm), Size 12 (21.4mm), Size 13 (22.2mm).\u003c\/p\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003eDimensions: Band width 6.08mm; Body thickness 2.3mm.\u003c\/p\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003eWeight: Approx. 2.7g (Size 10).\u003c\/p\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003eMaterial: Stainless Steel.\u003c\/p\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003eColors Available: Black, Silver, Champagne Gold, Rose Gold.\u003c\/p\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003eChipset: Nordic nRF 54L15.\u003c\/p\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003eMemory: RAM 256KB, NVM 1.5MB.\u003c\/p\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003eSensors: Accelerometer (ST LIS2DOC), Heart Rate Sensor (Tianyi Hexin 3697), Body Temperature Sensor.\u003c\/p\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003eConnectivity: Bluetooth 5.4 Low Energy.\u003c\/p\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003eBattery Type: Polymer Lithium-ion.\u003c\/p\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003eBattery Capacity: 16mAh (Sizes 8-13); 13mAh (Sizes 6-7).\u003c\/p\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003eCharging Method: Magnetic Charging Dock.\u003c\/p\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003eCharging Time: Approx. 1.5 hours.\u003c\/p\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003eUsage Time: 5-7 days active use; 15 days standby.\u003c\/p\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003eWaterproof Rating: 5ATM.\u003c\/p\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003eCompatibility: Android 5.1+ and iOS 9.0+.\u003c\/p\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003eApp Name: QRing.\u003c\/p\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003eSupported Languages: English, Chinese, Spanish, French, German, Italian, Japanese, Korean, Russian, Portuguese, Arabic, Hindi, Thai, Vietnamese, and more.\u003c\/p\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003eHS Code Suggestion\u003c\/p\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003e8517620000\u003c\/p\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003e \u003c\/p\u003e\n\u003ch3 style=\"width: 100%; height: auto;\"\u003ePacking List\u003c\/h3\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003esmart ring*1magnetic charger*1user manual*1gift box*1\u003c\/p\u003e\n\u003cdiv id=\"offer-template-0\" style=\"width: 100%; height: auto;\"\u003e\u003c\/div\u003e\n\u003cp style=\"width: 100%; height: auto;\"\u003e \u003c\/p\u003e\n\u003cp style=\"width: 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