Key Product Info. Blood-oxygen level measurement 60+ sports modes 5 ATM water-resistance 24/7 heart rate monitoring Sleep quality monitoring High-precision GPSPAI health assessment system 50 watch faces. Product Features. Blood-oxygen level measurement When feeling unwell under mental stress or engaged in intensive workouts such as marathons & gym sessions you can immediately measure your blood-oxygen saturation & understand your physical state. 60+ sports modes The Amazfit Bip U has 60+ exercise modes. These are Outdoor running Treadmill Walking Outdoor cycling Indoor cycling Yoga Cricket Baseball Basketball Table tennis Badminton Free training Fishing Pool swimming etc 5 ATM water-resistance Water-resistant up to 50 meters you can wear the Bip U for swimming & it will track your movements & record your achievements even under water. 24/7 heart rate monitoring With its Huami-proprietary Bio Tracker TM PPG biological optical sensor Bip U can maintain continuous 24-hour heart rate monitoring & provide elevated heart rate warnings. Sleep quality monitoring Accurately monitor your sleep stages including those of deep sleep light sleep REM awake time & afternoon naps & interpret the characteristics to provide you sleep quality score & insight. High-precision GPSEquipped with GPS & GLONASS positioning systems the Bip U Pro delivers more precise location tracking for you to review after outdoor sports like running or cycling. PAI health assessment system PAI is a health evaluation system that uses algorithms to transform complex information such as heart rate data activity duration & other health data into numerical values & presents this data to users. 50 watch faces 50 watch faces are available to suit your mood & outfit or you can upload your own photos for a more personalized watch face. The Bip U also supports animated watch faces that make every glance at your watch a unique experience..