Exercise Features: Average heart rate of total exercise - A figure expressed in beats per minute (bpm) representing the average heart rate measured over a specific period of time (e.g. a training session). Exercise Date HR-based target zones with audible alarm HR-based target zones with visual alarm Maximum heart rate of total exercise Polar EnergyPointer calculates the point where the main effect of training is turning fat burning into fitness improvement. Polar Fitness Test with Ownindex- calculates the point where the main effect of training is turning fat burning into fitness improvement. A fitness test that measures your aerobic fitness at rest in just five minutes. The result, Polar OwnIndex, predicts your maximal oxygen uptake (VO2max ). With the Polar Fitness Test you can measure your aerobic fitness by yourself, automatically and without any exertion. No other equipment other than a heart rate monitor is needed. The Polar Fitness Test is as accurate in predicting the VO2max as any submaximal fitness test. The test is based on gender, age, height, body weight, level of physical activity, heart rate and heart rate variability at rest. The result, OwnIndex, ranges usually from 20 to 95 and is comparable to VO2max, the golden standard of aerobic fitness. OwnIndex is most meaningful when following changes in your fitness over a long period of time. Find out how fit you are for your age and gender by comparing your result to the global references listed in the Polar user manuals. Polar OwnCal® Polar OwnCode® (5kHz) Wireless ECG accurate heart rate ZoneLock - You can activate a target zone based on Polar sport zones with a press of a button during your training. You can also deactivate the zone alarm just as easily – by pressing a button. ZonePointer - A visible and moving symbol on the display of your Polar product indicating that you are inside the pre-set target zone. Recording Features: Average heart rate Calorie expenditure - calculating the number of kilocalories expended Exercise Time (total) Maximum heart rate Number of exercise files (with summaries) - 50 Time in target zone - amount of total training time spent in your personal target zone Basic Features: Backlight Graphical target zone indicator Heart rate (displayed as % of maximum heart rate) Heart rate (displayed as bpm) HeartTouch™, button-free operation of wrist unit KeyLock Manual target zone (% / bpm) - upper limit Sound volume level setting Visual and audible alarm in target zones Polar WearLink® + 31 coded transmitter (changeable battery) Watch Features: Alarm with snooze Date and weekday indicator Dual time zone Low battery indicator Time of day (12/24h) with alarm User replaceable battery