Durable Battery Life-On a full charge, HUAWEI WATCH GT 3 42 mm lasts up to 7 days, so you're fully prepared to keep track of your every workout and not miss out on any health check. It supports wireless charging, so you can use your phone to reverse charge it when you forget your charger and say goodbye to battery life anxiety.<br />All-Day SpO2 Monitoring-Blood oxygen saturation (SpO2) is one of the important vital signs that can reflect the oxygen supply of the body. HUAWEI WATCH GT 3 smartwatch automatically provides 24-hour SpO2 level detection no matter when you are working, exercising or sleeping, which carefully protecting your health around the clock.<br />Personal AI Running Coach-The HUAWEI WATCH GT 3 smartwatch can assess your athletic ability based on your historical running data, and provide you with a scientific and professional running plan for your daily running and race preparation, whether you are a beginner or an advanced runner, and provide you with full tracking guidance.<br />Accurate Heart Rate Monitoring-The newly upgraded heart rate module includes eight photodiodes in a circular layout and two sets of light sources, combined with a curved glass lens for comfortable wear while reducing external light interference; the AI algorithm has been upgraded to filter out noisy signals more effectively, allowing accurate heart rate monitoring even during strenuous exercise, and improving the accuracy of health data such as blood oxygen. ">