Amazfit T-Rex Pro Outdoor Men’s Smartwatch is designed to explore your Instinct. Military-grade toughness with 10 ATM Water-resistance, 70°C heat resistance, -40°C 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 four 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 18-day battery life with typical use, and over 100 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 comfort–features an always-on 1.3-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.