Model Number:

Track your fitness and meet your goals. The Polar RS300X displays and records a wide variety of heart rate fitness data in a simple-to-use sport watch.


  • Polar RS300X sport watch
  • Polar WearLink+ 31 coded transmitter, size M-XXL

Watch Details

  • Alarm with snooze
  • Date and weekday indicator
  • Dual time zone
  • Low battery indicator
  • Stopwatch
  • Time of day (12/24h) with alarm

HRM Details

  • Automatic/Manual target zone
  • Backlight
  • Display zoom
  • Graphical target zone indicator
  • Visual and audible alarm in target zones
  • Heart rate (displayed as % of maximum heart rate or displayed as bpm)
  • HeartTouch, button-free operation of wrist unit
  • Maximum and average heart rate of total exercise
  • Maximum heart rate of each lap
  • Number of laps - 99
  • Polar OwnCal (calories burned, cal's per mile, cal's per hour)
  • KeyLock
  • Over-size display
  • Two lines of data displayed
  • Water resistant- 50m
  • Compatible with using Polar FlowLink 

Compatible Accessories Sold Separately

  • S1 Foot Pod 
  • G1 GPS sensor
  • FlowLink Data Transfer Unit