Specifications Hign-concerned Chemical:None Waterproof Grade:5ATM Model Number:R10 Activity Tracked:Steps Tracker,Distance Tracker,Calorie Tracker Metrics measured:Heart Rate Monitor,Sleep Monitor,Blood Oxygen Monitor,Body Temperature Monitor,Stress Monitor Certification:ce,FCC Brand Name:Uhoofit Battery Capacity(mAh):14mAh (18mAh for #10 and above) Basic Parameter Chipset: RTL8762 ESF APP: QRing Compatible System: For Android 5.1 or above, IOS 8.0 or above FLASH memory: RAM104KB FLASH 512KB BT: 5.2 Sensor: ST LIS2DOC Heart Rate: Vcare VC9213A (Dual PD Chip Sensor) Battery: 14mAh (18mAh for #10 and above) Ring charging time: about 1.5 hours Waterproof Level: 5ATM Major Function --Daily activities: steps, distance, calorie counting --Health Management:Heart Rate, Body Temperature, Oxygen Saturation, Sleep Tracking, Multi-Sport Mode, Stress, Heart Rate Variability --Other Functions:Remote Photo, Find Ring, Gesture Control, Games, Female Cycle Software Feature --Steps, sleep, heart rate, workout data recording --Health monitoring, pressure, blood oxygen measurement --Multiple exercise modes, photo taking --Supported languages: Danish, Ukrainian, Russian, Croatian, Hungarian, Hindi, Indonesian, Turkish, 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