The Polar AXN 300 sports watch shows your current altitude reading with graphical trend curve and your vertical progress. Keep track of your laps with the Slope counter and check your pace down the mountain or up the rock with the Vertical speed feature. The barometer allows you to track the changing weather. The Polar AXN 300 comes with the Polar T31 coded heart rate transmitter. The OwnIndex feature tests your fitness level, so you can set a baseline and track your improvements. The OwnCal feature monitors your energy expenditure (calories) so you know when to refuel.

• Wireless ECG accurate heart rate (displayed as beats per minute, % of max heart rate, as graphical trend)
• Self walk test with WalkIndex
• 1 set of Target Zone limits with visual and audible alarm
• Zone Pointer
• Fitness Bullets (for each 10 minutes in target zone)
• Weight Management Features:
  • Polar OwnCal
  • Body Mass Index
• Recording Features
  • 80 exercise files with summaries
  • Exercise file info page with date and time
  • Total exercise time
  • Time in target zone
  • Average heart rate of total exercise
  • Last OwnIndex
  • Calorie expenditure from exercise
  • Visual and audible alarm in target zones
  • Automatic logbook with circular memory (1 week)
  • Session totals
  • UpLink, settings upload from Polar web site or software to wrist unit
• Basic Features:
  • Heart rate displayed as bpm, % of maximum heart rate and as a graphical trend
  • Manual target zones in bpm
  • Visual & audible alarm in target zones
  • Water resistant to 100 meters
  • Backlight
  • Heart touch, button-free operation of wrist unit
• Watch Features:
  • Time of day (12/24 h) with 3 daily alarms
  • Dual time zone
  • Date and weekday indicator
  • Stopwarch
  • Low Battery Indicator
  • Countdown timer
  • 5 Reminders (visual / alarm)
  • User replaceable battery
• Comes with Polar T31 coded transmitter (also compatible with WearLink and T61 coded transmitters