【Advanced Health Monitoring】 The R99 Smart Ring offers comprehensive health tracking, including heart rate, blood oxygen, and sleep monitoring, with precise data analysis accessible via the app 【Waterproof and Durable Design】 Constructed with an IP68 waterproof rating and stainless steel casing, this ring is built to withstand everyday wear, even in challenging environments 【Comprehensive Activity Tracking】 Equipped with a high-accuracy step sensor and multiple sports modes (running, cycling, yoga, and more), the ring delivers accurate data for distance, calories, and steps, making it an ideal fitness companion 【Wide Compatibility and App Integration】 The SmartHealth app supports Android 8.0+ and iOS 10.0+, with features like camera control, sedentary reminders, and 31-language support, seamlessly integrating with WeChat Sports and Apple Health for a complete fitness experience 【Comfortable and Stylish Accessory】 The R99 Smart Ring is lightweight and comfortable to wear, it's a sleek accessory combining functionality with style to enhance any outfit Specifications: Waterproof IP68 Material Case: Stainless Steel Size (Optional) # 7(17.4 mm), # 8(18.2 mm), # 9(19.0 mm), # 10(19.9 mm), # 11(20.7 mm), # 12(21.5 mm) Thickness 2.6mm Weight Around 2.9g Chipset (Main Chip Model) AC6323 Memory (Rom+Ram) Flash: 4Mbit, RAM: 73KB G-Sensor STK8321 Bluetooth-compatible Version 5.3 Mobileapp-Gps Yes Heart Rate Sensor GH3018 Battery Type Polymer Pure Cobalt Battery Battery Protection Support lithium battery protection: Under-discharge protection voltage is 2.8V. Overcharge voltage when fully charged is 4.2V Operating Temperature Range -20 to 50℃ Charging Management Circuit The MCU has a built-in charging management PMU. The configurable charging current range is 5-300mA. It supports anti-reverse Battery Capacity 20mAh Charging Time 1.5-2 hours Theory Standby Time 7-9 days Normal Using Time 3-5 days Compatibility Android 8.0 and above; iOS 10.0 and above Operation The ring has no touch and no buttons; App initiates movement and function tests Motion Data Accurate distance / accurate calorie data / accurate step count Multisports Running, Cycling, Rope Skipping, Walking, Mountaineering, Yoga, Dance, Golf Step&G-Sensor Self-developed ring precision step counting algorithm, with an accuracy rate of more than 95% Heart Rate APP launches heart rate test / Dynamic rate trend and data analysis / Heart rate historical data Heart Rate Accuracy The accuracy rate of static heart rate is more than 98%,(compared with the laboratory test of heart rate belt) Sleep Precise sleep algorithm, sleep coach reminds Blood Oxygen APP initiated blood oxygen test / continuous blood oxygen data / historical blood oxygen data Camera Control The app's shake-to-take-photo feature Others Unit format, sedentary reminder, low power warning, heart rate warning Wechat&Apple Access Wechat Sports and Apple Health App Multi-Language Support The app supports 31 languages: Simplified Chinese, Traditional Chinese, English, French, Italian, Spanish, Portuguese, Japanese, German, Polish, Hungarian, Russian, Ukrainian, Korean, Vietnamese, Thai, Croatian, Swedish, Norwegian, Danish, Finnish, Czech, Slovak, Irish, Arabic, Hebrew, Persian (Iranian), Turkish, Romanian, Greek, and Indonesian Support Ota Supports OTA App SmartHealth Package included 1 x Ring 1 x Charging Case 1 x Charging Cable 1 x English Instruction Manual Specifications Brand N/A Certificate CE-RED,CE-RoHS,FCC-ID ColorStyle G Packaging Type Paper Box Plug Type (For Supply) N/A User Manual (Language) English Gross Weight 0.101kg Volume Weight 0.061kg Package Length 10.300cm Package Width 8.200cm Package Height 3.200cm