Features:1.Comprehensive Health Tracking: The R02 Smart Ring features advanced monitoring for blood pressure, oxygen saturation, sleep, heart rate, and steps, alongside multiple sports modes, ensuring a full spectrum of health data at your fingertips.2.Multilingual App Support: Accommodating a global user base, the accompanying app of this health tracker supports a wide array of languages including Danish, Ukrainian, Russian, Croatian, Hungarian, Hindi, Indonesian, Turkish, Hebrew, Greek, German, Italian, Latvian, Czech, Slovak, Slovenian, Japanese, French, Polish, Thai, Estonian, Swedish, Lithuanian, Chinese (Simplified and Traditional), Romanian, English, Dutch, Portuguese, Spanish, Vietnamese, Arabic, Korean, and Malay.3.Lightweight Comfort: Engineered for both durability and comfort, the fitness tracker ring is as light as a feather, offering a wear-and-forget experience without compromising on robustness or the precision of its sensors.4.IP68 Waterproof: With its fully sealed design, the sleep monitor comes with IP68 waterproof certification, allowing for worry-free use during swimming, handwashing, and rain, meeting all your waterproofing needs.5.Rapid Magnetic Charging: The heart rate tracker is equipped with a magnetic charging system and a 17mAh polymer lithium battery, which provides long-lasting battery life and allows for real-time battery level checks via the app.Specification:Origin: Mainland ChinaColor: Black, Rose Gold (Optional)Main Functions: Step Count, Distance, Calorie Count, Heart Rate, Blood Oxygen Saturation, Pressure, Sleep Tracking, Multi-Exercise ModeChip Manufacturer: for Lianrui MicroChip: RF03Compatible Systems: for Android5.1 or Above, for IOS8.0 or AboveFlash Memory: Ram 208kb Rom 512kbBt: 5.0 Bluetooth-Compatible Low Power ChipAcceleration Sensor: for Siltron STK8321Heart Rate: Vcare VC30fBattery Type: Polymer Lithium IonCapacity: 17mahCharging Mode: Magnetic ChargingWaterproof Rating: 5ATMCharging Time: About 1 HourBattery Life: 5-7 Days, Standby For 15 DaysAppearance Material: Stainless SteelSize Diameter (mm) : No.8 18.1mm/0.71in, No.9 18.9mm/0.74in, No. 10 19.8mm/0.77in, No. 11 20.6mm/0.80in (Optional)Weight: 4.4gPacking Size: 75*75*43mm/2.93*2.93*1.68inGross Weight: 70gPackage Included:1*Ring