Smart Ring Fitness Ring Heart Rate Monitor Sleep Tracker Pedometer Calories Step Counter Fitness Tracker Health Ring 5ATM Waterproof Smart Rings Stay connected with this feature-packed smart watch that provides you with a huge range of useful features to monitor steps, calories, sleep quality, blood pressure, blood oxygen and more. Features: Major function:Steps,distance,calorie calculation,heart rate,blood oxygen saturation,blood pressure,sleep tracking,multiple sports modes App software features:Step count, sleep monitoring, heart rate tracking, exercise data records,Health monitoring, pressure, blood oxygen measurement,multiple sports modes, take photos Supported languages: Danish, Ukrainian, Russian, Croatian, Hungarian, Hindi, Indonesian, T rkiye, 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 Specification: Material: Aluminum alloy Color: Black, Silver, Gold Ring Size: This is link 2XL: 12# Inner diameter 21.6mm, circumference 67.8mm S as below link: 8# Inner diameter 18.3mm, circumference 57.5mm https://www.kogan.com/au/buy/wlw-smart-ring-fitness-ring-heart-rate-monitor-sleep-tracker-pedometer-calories-step-counter-fitness-tracker-health-ring-5atm-waterproof-smart-rings-silver-ytaz09s636150-sil-s/ M as below link: 9# Inner diameter 19.1mm, circumference 60mm