Specifications Hign-concerned Chemical:None Waterproof Grade:5ATM Model Number:R11 Display screen:Yes NFC Support:No Activity Tracked:Activity Tracker,Steps Tracker,Distance Tracker,Calorie Tracker Metrics measured:Heart Rate Monitor,Sleep Monitor,Blood Oxygen Monitor,Stress Monitor Item Weight:3.5g Case Material:Alloy Certification:ce,FCC Battery Capacity(mAh):15mAh Key Feature APP:Qring Chipset:RTL8762 ESF Memory:RAM104KB FLASH 512KB BT: BT5.2 Waterproof grade:5ATM Body MaterialAlloy stainless steel Battery: 15mAh Lithium polymer Charging MethodWireless charging Charging Time: About 1.5 hours Normal Using Time: 5-7 days (depending on personal habits) Standby Time: 10days-15days AuthenticationCE;FCC;RoHS Supported Systems :Android5.1or above, iOS8.0 or above Main Function 1> Daily activities: Step count, distance, calorie calculation 2> Health management: heart rate measurement, blood oxygen saturation, sleep tracking, multiple exercise modes, stress, heart rate variability 3> Touch function: single point switching display function 4> Display: time, steps, heart rate, battery level, likes count 5> Other functions: remote control for taking photos, searching for rings, gesture control, gaming, female cycle Firmware language: Danish, Ukrainian, Russian, Croatian, Hungarian, Hindi, Indonesian, Trkiye, Hebrew, Greek, German, Italian, Latvian, Czech, Slovak, Slovenian, Japanese, French, Polish, Thai, Estonian, Swedish, Lithuanian, Simplified Chinese, Traditional Chinese, Romanian, English, Dutch, Portuguese, Spanish, Vietnamese, Arabic, Korean, Malay Package Included: Original Ring x1,Charger Warehouse x1,Manual x1