You can use the Amazfit GTS 4 wrist assistant as a fitness tracker, for communication, and for other purposes. With 150 sports modes, it will help you monitor your body condition during any sports activity. It measures: heart rate and breathing rate, stress level, blood oxygen content. Useful for outdoor and indoor sports activities. In addition, it is waterproof. ZEPP makes communication easier through the app and Bluetooth support, shows you incoming calls and messages on your phone, and allows you to answer calls. He also has a musical memory.