Ultra large 1.75" HD AMOLED Display: It's time to see the bigger picture of your health and fitness. Immerse yourself in the ultra large 1.75" AMOLED display, and view the data that matters to your wellness journey in pristine HD clarity. Super Strong & Accurate GPS Tracking: The Amazfit GTS 4 smart watch uses industry leading dual band circularly polarized GPS antenna technology, for stronger positioning that's 99% as accurate as top handheld GPS locators. Whether you're hiking a tree covered trail or cycling to work through a congested city center, enjoy positioning that's unimpeded by environmental and multi path interference. You can even import a route file to the smartwatch from the Zepp App and navigate your way along it in real time. Easy 24/7 Health Management : Enjoy highly accurate 24 hour monitoring of heart rate, blood oxygen saturation and stress levels. The Amazfit GTS 4 smart watch can also detect your breathing rate, and is able to quickly measure these four important health metrics in one easy tap. Up to 8 Days' Battery Life: Crush your professional and workout goals for up to eight days at a time. Primed for action, the battery of the Amazfit GTS 4 fitness watch packs a 300 mAh rated value, and the smartwatch's new Battery Saver Mode even enables continued use of features like sports modes, measurement of health metrics, and more, all while saving power. Smart Recognition of Strength Training Exercises: The Amazfit GTS 4 smart watch can automatically recognize the movements and count the reps of dozens of strength training exercises, many of which have adjustable variations in the Zepp App, as well as track your rest time between sets. After your workout, the Zepp App will show you the muscle group you exercised and how long you exercised it for, to help keep your training efficient. water resistance level : water resistant; wireless comm standard : bluetooth