Specifications Hign-concerned Chemical:None Waterproof Grade:5ATM Model Number:R08 Display screen:No NFC Support:No Function:Message Reminder Activity Tracked:Activity Tracker,Steps Tracker,Distance Tracker,Calorie Tracker Metrics measured:Heart Rate Monitor,Sleep Monitor,Blood Oxygen Monitor,Body Temperature Monitor,Stress Monitor Item Weight:5g Case Material:STEEL Certification:ce,FCC Battery Capacity(mAh):15mAh Package Included: Original Ring x1,Charger Warehouse x1,House Charging Cable x1,Ring Charging Cable x1, Manual x1 Key Feature APP:Qring Chipset: RTL8762 Memory:RAM 104KBROM 512 KB BT: BT5.2 Waterproof grade:5ATM Body MaterialAlloy Battery: 15mAh Lithium polymer Charging MethodMagnetic charging warehouse Charging Time: About 1.5 hours Normal Using Time: 5-7 days (depending on personal habits) Standby Time: 7days-10days AuthenticationCE;FCC;RoHS Supported Systems :Android 5.0 and above iOS 10.0 and above Main Function 1> Receive message reminders, call reminders, and other social app messages and schedules to ensure you don't miss important information 2>Health management: Heart rate measurement, blood oxygen saturation, HRV heart rate variability, stress, sleep tracking, smart ring temperature 3> Exercise Record: Steps, Distance, Calories, 4> Smartphones that can be paired through simple gestures. Simply shake the finger wearing the smart ring up and down to control the photo taking. 5>Remote control photography.Through the touch area, various functions can be switched by simply tapping, sliding, and other gestures. 6.>Fingertip games . It provide a more immersive gaming experience by tapping your fingers up and down in various games. 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