- Military-Grade Toughness - 10 ATM Water-Resistance - 24-Day Battery Life - Sweat-Wicking Design - -40C Cold Resistance Amazfit T-Rex 2 Outdoor Smartwatch is designed to explore your instinct. Military-grade toughness with 10 ATM Water-resistance, 70C heat resistance, -40C cold resistance, 240 hours humidity resistance, and 96 hours salt spray resistance. Witness endurance that braves the elements with ease. Get a high-level exploration partner that boasts Five Global Navigation Satellite systems, a weather tracker, a sunrise and sunset monitor, a current moon phase display, a compass, and a barometric altimeter. Ultra-long 24-day battery life with typical use, and over 150 different sports modes to track your every move. Protect your health and keep fit with heart rate, sleep quality monitoring, and blood-oxygen saturation measurement, and get personalized evaluations via built-in health assessment system PAI. This is a fitness watch that strikes the perfect balance between practicality and comfortfeatures an always-on 1.39-inch HD amoled color screen for smoother touch operation and richer & brighter color, a skin-friendly silicone strap with a sweat-wicking design to ensure it stays dry and comfortable. Compatibility Compatible with Android and IOS devices. Function - 150+ Sports Modes - Smart Recognition - 24H Heart Rate Monitoring - SpO2 Monitoring - Sleep Monitoring - Stress Monitoring Display Features a large 1.39 HD AMOLED screen, making it easier to see the data that is vital to your adventure. Personalize your display by selecting from dozens of watch faces with matching always-on display. Unique Features Tackle long adventures on just one battery charge! The battery will last 24 days wih typical usage, 45 days in battery saver mode or 10 days of heavy usage. Design The matte finish and metal sprayed outer bezel are complemented by a sweat-