TK5 Smart Ring Health Tracker Waterproof Heart Rate Blood Oxygen Sleep Monitor with Charging Case - Black/Size 13 【Multi-Functional Health Monitoring】This smart ring offers comprehensive health tracking,including heart rate,blood oxygen,sleep,and blood pressure monitoring,providing a complete picture of your well-being. 【Advanced Activity Tracking】With multiple exercise modes and step counting,this ring is perfect for fitness enthusiasts looking to track their daily activities and workouts. 【Durable and Waterproof Design】Featuring a 5ATM + IP68 waterproof rating,this smart ring is suitable for swimming and can withstand submersion up to 50 meters,ensuring durability in various environments. 【Long Battery Life】Enjoy up to 3 days of use on a single charge when connected to Bluetooth-compatible,with a convenient charging case that extends usage time. 【Comfortable and Lightweight】Weighing only about 5.0 grams,this smart ring is designed for all-day comfort without compromising on functionality. 【Wide Compatibility】Compatible with Android 5.0 and above,HarmonyOS,and iOS 10.0 and above,ensuring broad device support. 【Multi-Language Support】The companion app supports 20 languages,making it accessible to a global user base. Specifications: Outer material: stainless steel Main body material: epoxy resin Compatible system: Android 5.0 and above; Hongmeng system; IOS 10.0 and above Hardware configuration: CPU: JL AC6323A4 Storage capacity: It is recommended to connect to the app and synchronize data every day. The ring can store up to 15 days of data,depending on the type and frequency of use Heart rate sensor: Goodix GH3018 Battery capacity: Ring: 16mAh,charging case: 200mAh Battery life: About 3 days when connected to Bluetooth-compatible,depending on the frequency of use Luminous sensor: LED is in a visible color range,which is safe and user-friendly Connection method: Low-power Bluetooth-compatible 5.0 Product weight: about 5.0g Software program updatability: Updated through software application Waterproof level: 5ATM + IP68 Interface configuration: Charging interface: Magnetic charging with short-circuit protection Charging time: about 30 minutes Main functions: Exercise monitoring,sleep monitoring,multiple exercise modes,heart rate monitoring,blood oxygen monitoring,blood pressure measurement and monitoring,remote care,5ATM+IP68 waterproof Supported languages: APP: Russian,Hungarian,Turkish,German,Italian,Czech,Slovak,Japanese,French,Polish,Persian,Simplified Chinese,Traditional Chinese,English,Portuguese,Spanish,Vietnamese,Arabic,Korean,Thai Size: No. 8: Diameter: 18.1mm,Finger circumference: 56.9mm No. 9: Diameter: 18.9mm,Finger circumference: 59.5mm No. 10: Diameter: 19.8mm,Finger circumference: 62.1mm No. 11: Diameter: 20.6mm,Finger circumference: 64.6mm No. 12: Diameter: 21.4mm,Finger circumference: 67.2mm No. 13: Diameter: 22.2mm,Finger circumference: 69.75mm Package included: 1 x Ring 1 x Charging Case 1 x Charging Cable 1 x English Instruction Manual