Monitors heart rate at the wrist and uses GPS to track how far, how fast and where you've run Run your best with helpful training tools, including race time predictions and finish time estimates Provides personalized guidance and daily suggested workouts based on your training history, fitness level and recovery time PacePro™ feature offers GPS-based pace guidance for a selected course or distance, helping you plan your race day strategy; not compatible with on-device courses Track all the ways you move with built-in activity profiles for running, cycling, track run, virtual run, pool swim, Pilates, HIIT, breath work and more Tune in to your body with advanced wellness features, such as intensity minutes, fitness age, all-day respiration and more Battery life: up to 2 weeks in smartwatch mode; up to 20 hrs. in GPS mode