For enthusiast runners

You want to go for a run and know how speed and distance can aid your performance. Without heart rate, you can only get so far. The RS300X combines these three to give you a true understanding of the effort you put in. And on top, all the essential heart rate features come along RS300X, on the run and online.

• Measures your heart rate combined with speed and distance
• Helps you to train at the right intensity with personal training zones
• Displays how many calories you’ve burned
• Tracks your latest 16 training sessions and your last 16 weeks of training
• Transfers training data to polarpersonaltrainer.com with optional Polar FlowLink

Basic features

• Automatic/Manual target zone (% / bpm / HRR%)
• Backlight
• Display zoom
• Easy start (setting wizard)
• Event Countdown Timer
• 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
• Over-sized display
• User configurable displays
• Visual and audible alarm in target zones
• Water resistant - 50m

Cycling features

• Bike mount - opt.

Data transfer

• Compatible with polarpersonaltrainer.com with Polar FlowLink

GPS features

• Battery type - opt.
• Full power mode (up to 30 hours with an optional lithium battery) - opt.
• Low battery indicator - opt.
• Low power battery mode - opt.
• SIRF-III chipset - opt.
• Shock resistant - opt.
• Speed and Distance - opt.
• WAAS support (wide area augmentation system) - opt.
• Water resistant - opt.

Language features

• Display text in English, German, French and Spanish

Polar exercise features

• Automatic lap recording - opt.
• Average heart rate of each lap
• Average heart rate of total exercise
• Exercise Date
• Exercise Set (extended exercise profiles)
• HR-based target zones with audible alarm - 3
• HR-based target zones with visual alarm - 3
• HRmax (Polar Fitness test-based)
• HRmax (age-based)
• Interval trainer (HR, pace, distance) guided workouts
• Maximum heart rate of each lap
• Maximum heart rate of total exercise
• Number of laps - 99
• Polar Fitness Test with OwnIndex
• Polar OwnCal
• Polar OwnCode (5kHz)
• Polar OwnZone
• Polar sport zones
• Speed-based target zones with visual and audible alarm - opt.
• Wireless ECG accurate heart rate
• ZoneLock
• ZonePointer

Recording features

• Average heart rate
• Calorie expenditure - exe.total
• Exercise Time (total)
• Exercise file info page with date and time
• Lap info
• Last OwnIndex
• Maximum heart rate
• Number of exercise files (with summaries) - 16
• Target zone limits
• Time in target zone

Running features

• Distance summaries
• G1 GPS Sensor - opt.
• Run Distance
• Polar S1 foot pod
• Speed displayed in pace, or kmph/mph
• Speed/Pace and Distance
• Speed/Pace summaries
• Speed/Pace target zones
• Target pace
• Target pace alarms
• Time and Distanced based interval timer
• Totals mileage, kilocalories, time training
• Trip Odometer

Transmitter belt

• Polar WearLink + 31 coded transmitter (changeable battery)

Watch features

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