Honor Watch GS 3 Smartwatch 8-Channel Heart Rate AI Engine HONOR Watch GS 3 equipped with 8-Channel Heart Rate AI Engine, combine with heart rate signal AI fusion, which can accelerate the operation time and acquire more accurate optical signal in order to bring over 97% accurate health data to help everyone monitor their holistic health easier. Blood Oxygen Monitor HONOR Smart Watch is your health butler consistently, to gives you all-day protection with low blood oxygen level alerts and high altitude climbing alert when you need to pay attention to you SpO2 level. Sleep and Pressure Monitoring Based on Honor health technology, it provides entire sleep tracking and 7*24 hours pressure monitoring. You can release the pressure and regulate your state at the right time by breathing training (APP terminal).