Amazfit T-Rex Pro Smartwatch Unleash your inner explorer with the Amazfit T-Rex Pro. Designed for the outdoors, this rugged smartwatch is your ultimate adventure companion, offering 10 ATM water-resistance, blood-oxygen saturation measurement, and a suite of navigation systems including a compass and barometric altimeter. Enjoy an ultra-long 18-day battery life and track your fitness with over 100 different sports modes. Its built to endure, passing 15 military-grade tests. In great condition and ready for your next adventure