Features: 1.55″ colourful touch display100+ fitness modes 5 ATM water resistance*SpO₂ measurement* and 24-hour heart rate trackingMulti-system standalone GPSUp to 10 days of battery life* 100+ workout modes Track your exercises like an expert17 professional modes, including HIIT and Yoga to help you achieve your fitness goals you wanted. 100 extended workout modes that offer you more options. High-precision GPS chip, Supports the four major global positioning systems The built-in GNSS chipset comes with improved performance for more precise position tracking. Four major global positioning systems–GPS, GLONASS, Galileo, BDS–are supported. Blood Oxygen Measurement* Blood oxygen saturation (SpO₂) level indicates the amount of oxygen in the blood. Get an SpO₂ measurement anytime anywhere for your peace of mind. Supports continuous SpO₂ tracking during sleep. Sleep Monitoring* Monitors long sleeps and sporadic naps. Provides detailed reports on deep sleep, light sleep and REM* stages to help you find out what is going on during your sleep. 24-Hour Heart Rate Tracking