Meet the Amazfit T-Rex 2 Smart Watch: a rugged military grade smartwatch with over 150+ sports modes that is ready for all your outdoor activities. It has a 1.39-inch AMOLED display and supports 5 satellite positioning systems (GPS/GLONASS/Galileo/BeiDou/QZSS). It is 10 ATM waterproof.
This watch is -40C cold resistant and 70C heat resistant. It lasts up to 24 hours on battery. The watch runs Zepp OS and supports 3rd party apps. You can find out more about it here.