Push yourself to go beyond and back while tracking vitals, routes and routines along the way with the Polar Grit X multisport GPS watch, a durable, lightweight design that's in step on all the action. High-strength stainless-steel case, bezel and lugs with glass-fiber-reinforced polymer caseback ensures durability in the toughest conditions An always-on color touchscreen display has laminated Gorilla glass lens with anti-fingerprint coating for clear, easy readibility Extra-long-lasting battery stays powered for 40 hours in training mode with GPS and wrist-based heart rate active, or up to 7 days in watch mode with continuous heart rate Precision Prime heart rate monitor combines the latest in bio-impedance electrodes and optical sensors with a revised algorithm for the most accurate, continuous optics Integrated GPS covers speed, distance and route guidance, whenever you're going Enhanced Route Navigation with Komoot includes a breadcrumb-style Back-to-Start feature and a compass to keep you moving in the right direction FuelWise reminder lets you know when to refuel by eating Polar Flow supports over 130 sports to help you train better Multisport Mode lets you switch between sports, record transition times and capture key swim metrics like stroke, distance and pace Glanceable Weather Forecast mode tracks daily weather data so you're not caught in the rain unprepared Hill Splitter automatically recognizes your ascents and descents to capture key metrics for each climb Training LoadPro separates cardio load, muscle load and perceived load with an unparalleled view into how your training affects your body Pairs with your favorite compatible cycling accessory to capture data while riding Tracks speed, distance, running power and route when running Syncs to your phone for smart notifications that alert you of incoming calls, texts and more