Unleash your adventurous spirit with the Zeblaze Stratos 4 Rugged GPS Smart Watch, engineered for the most demanding environments and peak performance. This formidable timepiece has conquered 15 military-grade tests, operating flawlessly between -40℃ and +50℃. Its robust construction features a high-strength metal bezel with a drilling carbon coating, complemented by durable 316L stainless steel buttons and buckle, all protected by tough Corning Gorilla Glass. Dive into any adventure with confidence, thanks to its 5 ATM and IP69K water resistance, perfect for swimming and marine activities. Experience crystal-clear visibility on the vibrant 1.43-inch HD AMOLED display, boasting a sharp 466x466 pixel resolution and 391 PPI. With an impressive 1,000 nits peak brightness, your data remains perfectly legible under direct sunlight. Navigate the world with exceptional precision, as the Stratos 4 utilizes a global 6-satellite positioning system, supporting GPS, GLONASS, GALILEO, QZSS, NAVIC, and BDS. Integrated sensors including a compass, gyroscope, and barometric altimeter provide comprehensive environmental data, while real-time track and track return features ensure you never lose your way. A built-in LED flashlight offers convenient illumination when you need it most. Elevate your fitness journey with over 170 sports modes, including new open water swimming tracking, and smart sport recognition for common activities. Monitor your well-being with advanced health tracking, encompassing heart rate alerts, SpO2 blood oxygen saturation, stress levels, and detailed sleep analysis, alongside dedicated women's health features. Stay connected on the go with Bluetooth phone calls directly from your wrist and an offline voice assistant for seamless control. All your health and fitness data syncs effortlessly with the GloryFitPro app, offering actionable insights and a vast selection of customizable watch faces. Powering this powerhouse is a 500 mAh battery, delivering an astounding 60 days of life in long battery mode, 30 days with typical use, and 18 days even with always-on display. The Zeblaze Stratos 4 is more than a watch; it's your ultimate companion for exploration and peak performance.