Easy-to-use running watch monitors heart rate (this is not a medical device) at the wrist and uses GPS to track how far, how fast and where you've run Take the guesswork out of training with suggested workouts of varying intensities based on your training history, fitness level and recovery time Plan your race day strategy with the PacePro feature (not compatible with on-device courses), which offers GPS-based pace guidance for a selected course or distance Run your best with helpful training tools, including race time predictions and finish time estimates Battery Life - up to 2 weeks (smartwatch mode), up to 20 hours (GPS mode)