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 China Color: Black, Rose Gold (Optional) Main Functions: Step Count, Distance, Calorie Count, Heart Rate, Blood Oxygen Saturation, Pressure, Sleep Tracking, Multi-Exercise Mode Chip Manufacturer: for Lianrui Micro Chip: RF03 Compatible Systems: for Android5.1 or Above, for IOS8.0 or Above Flash Memory: Ram 208kb Rom 512kb Bt: 5.0 Bluetooth-Compatible Low Power Chip Acceleration Sensor: for Siltron STK8321 Heart Rate: Vcare VC30f Battery Type: Polymer Lithium Ion Capacity: 17mah Charging Mode: Magnetic Charging Waterproof Rating: 5ATM Charging Time: About 1 Hour Battery Life: 5-7 Days, Standby For 15 Days Appearance Material: Stainless Steel Size 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: 4.4g Packing Size: 75*75*43mm/2.93*2.93*1.68in Gross Weight: 70g Package Included: 1*Ring