MILITARY STANDARD & 1.3” AMOLED DISPLAY -- A military standard smartwatch with 12 military certifications, enhancing the robustness and resistance to harsh environments. Boasting a 1.3” AMOLED color screen with an always-on display, making important information available simply by raising your wrist. ULTRA-LONG BATTERY LIFE -- A deep power optimization gives the Amazfit T-Rex watch a 20-day ultra-long battery life on a single charge. Stays with the user over the long haul, allowing you to wear it without worry and never think about charging. HIGH-PRECISION GPS -- T-Rex smartwatch uses a high-end Sony GPS chip and built-in highly precise dual-satellite positioning system. Signal efficiency has been significantly increased, making satellite search faster and positioning more accurate. A Good Sports Companion -- This fitness watch has 14 built-in professional sports modes and is rated waterproof to 5ATM (50 Meters). You can wear it while swimming in pools and open water to meet the diverse needs of athletes. Focus On Your Health -- The smartwatch is equipped with Huami's self-developed BioTracker PPG Bio-Tracking Optical Sensor, which performs 24-hours high-precision heart rate monitoring. The watch also issues reminders to stand up, which encourage you to develop healthy habits and become your best self. A Practical Tool at Your Wrist -- The Amazfit T-Rex smartwatch comes with a wealth of smart functions, including weather forecast, event reminders, call reminders, app notifications, and more, offering a variety of practical tools to facilitate your daily work and life.