EKG Accurate Heart Rate In Beats Per Minute (BPM)/ Manual target zone (BPM) / Automatic heart rate zone (BPM) / Color: Dark Grey # The FS3 Monitor is designed to help users achieve their Personal fitness goals and to indicate the level of physiological strain and intensity during an exercise session. It has added features beyond the basic heart rate monitor to give a complete workout. This well-rounded monitor offers automatic age-based heart rate target zones that will keep you exercising on the right track. You can also override the automatic setting to manually change this zone for fine Tuning to fit your particular metabolism. Visual and Audible alarm in target zone / Water resistant to 50 meters / Extra large digits # Recording features: Exercise time (total) / Average heart rate of total exercises / Maximum heart rate # Watch features: Time of day / Stopwatch / Date and Weekday indicator / Backlight # Includes Wrist Unit with CR2025 battery, Transmitter with built-in lithium cell, and Elastic Strap to hold transmitter on chest.