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: WaterproofIP68MaterialCase: Stainless SteelSize (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)Thickness2.6mmWeightAround 2.9gChipset (Main Chip Model)AC6323Memory (Rom+Ram)Flash: 4Mbit, RAM: 73KBG-SensorSTK8321Bluetooth Version5.3Mobileapp-GpsYesHeart Rate SensorGH3018Battery TypePolymer Pure Cobalt BatteryBattery ProtectionSupport lithium battery protection: Under-discharge protection voltage is 2.8V. Overcharge voltage when fully charged is 4.2VOperating Temperature Range-20 to 50Charging Management CircuitThe MCU has a built-in charging management PMU. The configurable charging current range is 5-300mA. It supports anti-reverseBattery Capacity20mAhCharging Time1.5-2 hoursTheory Standby Time7-9 daysNormal Using Time3-5 daysCompatibilityAndroid 8.0 and above; iOS 10.0 and above