Garmin Forerunner 405 Loaded with serious training features, Forerunner 405 continuouslymonitors your time, distance, pace, calories and heart rate (whenpaired with heart rate monitor). Each run is stored in memory so youcan review and analyze the data to see how you've improved. You caneven download recorded courses to compete against previous workouts orrace a Virtual Partner. Customize Forerunner's data screens for instantfeedback while you train. Features GPS-enabled sport watch tracks distance, pace, calories burned and heart rate Battery life is 8 hours per charge or 2 weeks in power save mode GPS can mark waypoints, go back to start, and save locations