For outdoor athletes who train hard and move fast Features a redesigned heart rate sensor for improved accuracy Improved GPS for more accurate data 1.2 in. 2.5D AMOLED touch screen offers vivid color, crisp definition and auto-adjusting brightness that adapts instantly to sunlight or shade-it&';s easy to read from any angle Lightweight, low-profile design for comfort all day and night Voice recorded training laps Barometric altimeter for accurate elevation measurement Breadcrumb Navigation feature helps you stay on track Create and sync routes directly from the COROS app Syncs with Strava, Training Peaks, Apple Health and more COROS app (iOS and Android) and Training Hub (web portal) allow you to track your progress and analyze your performance metrics With the COROS app and Training Hub, you can also build customized training plans, access a library of workouts or talk to your coach Free COROS Coaches service provides you with personalized suggestions to take your training to the next level Rated to 5 atm (50 m), making it safe for swimming, rain or sweat-heavy sessions; record pool and open-water swims, shower with it, or train in any weather without worry Enjoy your favorite music with built-in audio support Nylon watchband and charging cable included