Monitor yourself 24/7 with the Amazfit GTR 3 Pro health smartwatch. Designed with a BioTracker PPG 3.0 biometric sensor, it tracks your blood oxygen levels, heart rate, stress levels, and sleep patterns. Best of all, it has a 12-day battery life. In addition, this health smartwatch offers more than 150 sports modes to accurately track your aptitude. With PeakBeaks, the Amazfit GTR 3 Pro assesses your complete recovery time, training load, training effect and maximum oxygen intake. This allows you to assess your performance and make the necessary adjustments. In addition, this watch has a built-in barometric altimeter to keep an eye on air altitude and atmospheric pressure from outdoor activities. It even supports GPS to accurately track your route as you venture into new areas. Finally, if improving your fitness is important to you, you’ll love Virtual Pacer, a feature to run against yourself.