R99 Smart Ring with Charging Case Support Heart Rate,Blood Oxygen,Sleep Monitoring - Silver/ 12/21.5mm• 【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• 【Stylish Accessory and Smart Technology】 The R99 Smart Ring is more than just a health monitor; it's a sleek accessory crafted from stainless steel in silver,gold,and black options,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 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 and 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 and 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