Key Product Info . Blood-oxygen level measurement60+ sports modes5 ATM water-resistance24/7 heart rate monitoringSleep quality monitoringHigh-precision GPSPAI health assessment system50 watch faces . Product Features . Blood-oxygen level measurementWhen feeling unwell under mental stress or engaged in intensive workouts such as marathons and gym sessions you can immediately measure your blood-oxygen saturation and understand your physical state. 60+ sports modesThe 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-resistanceWater-resistant up to 50 meters you can wear the Bip U for swimming and it will track your movements and record your achievements even under water. 24/7 heart rate monitoringWith its Huami-proprietary BioTrackerTM PPG biological optical sensor Bip U can maintain continuous 24-hour heart rate monitoring and provide elevated heart rate warnings. Sleep quality monitoringAccurately monitor your sleep stages including those of deep sleep light sleep REM awake time and afternoon naps and interpret the characteristics to provide you sleep quality score and insight. High-precision GPSEquipped with GPS and 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 systemPAI is a health evaluation system that uses algorithms to transform complex information such as heart rate data activity duration and other health data into numerical values and presents this data to users. 50 watch faces50 watch faces are available to suit your mood and 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..