Specifications Hign-concerned Chemical:None Waterproof Grade:5ATM Model Number:R08 Activity Tracked:Steps Tracker,Distance Tracker,Calorie Tracker Metrics measured:Heart Rate Monitor,Sleep Monitor,Blood Oxygen Monitor Certification:ce,FCC Brand Name:Uhoofit Basic parameter Chipset: RTL8762 ESF APP: QRing Compatible System: For Android 5.1 and above, IOS 8.0 and above FLASH memory: RAM104KB FLASH 512KB BT: 5.2 Battery: 15mAh (18mAh for #10 and above) Waterproof: 5ATM Major function 1>Daily activities: steps, distance, calorie counting 2>Health management: heart rate, oxygen saturation, HRV heart rate variability stress, sleep tracking, skin temperature measurement 3>Indicator: message reminder, charging status 4>Touch Function: Music Control, Short Video Control 5>Other Functions: Remote Control Photo, Female Physiology Reminder, Multi-Sport Mode Software feature Steps, sleep, heart rate, workout data logging Health monitoring, pressure, blood oxygen measurement Multiple exercise modes, photo taking, message reminders 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