The Amazfit T-Rex Pro is an ultra-durable sports smartwatch, specifically designed for adventure lovers, outdoor activities, and harsh conditions. The watch features a very strong body that is shock and water-resistant and complies with military standards. [1, 2, 3, 4, 5] Design and Durability Military Grade Toughness: Passed 15 military tests for extreme heat, cold, and humidity resistance. Water Resistance: Supports 10 ATM standard, meaning it is water-resistant up to 100 meters (suitable for swimming and diving). Display: 1.3-inch AMOLED color screen, supports "Always-On Display" feature. Weight: Lightweight compared to its toughness, weighing only about 60 grams with the strap. [1, 2, 3, 4, 5] 🔋 Battery and Charging Normal Use: Battery lasts up to 18 days on a single charge. Intensive Use: Lasts up to 9 days. Basic Watch Mode: Can reach up to 66 days (when smart features are turned off). Charging: Fast magnetic charging takes about 1.5 hours. [1, 2, 3, 4] 🏃 Sports and Health Features Tracking Systems: Equipped with a high-precision quad-satellite positioning system (GPS, GLONASS, BeiDou, Galileo) for wilderness navigation. [1, 2] Sports Modes: Supports over 100 different sports modes (running, cycling, skiing, and more). [1, 2, 3] Health Sensors: Blood Oxygen Measurement (SpO2). 24-hour Heart Rate Monitoring. Sleep Quality and Stress Level Tracking. PAI system for assessing overall health status. [1, 2, 3, 4, 5] Adventure Tools: Includes a digital compass, a barometric altimeter, and tracking for weather conditions and sunrise/sunset times. [1, 2] 💬 Smart Features and Compatibility Compatibility: Works with Android and iPhone phones via the Zepp app. Notifications: Receives notifications, messages, and incoming call alerts (alert only, does not support reply or call due to lack of microphone). Music: Allows control of music playing on your phone. Material: Rubber Brand: Apple Movement Type: Digital Features: Water Resistant Watch Size: 44mm