The RS400 is designed for the active endurance athlete who wants to improve their performance by planning, monitoring and analyzing training data. Polar exercise features Wireless ECG accurate heart rate. Polar sport zones. Polar OwnZone. Polar OwnCal. Polar Fitness Test with OwnIndex. Polar OwnCode 5kHz. Polar OwnOptimizer. HRbased target zones with visual alarm 3. HRbased target zones with audible alarm 3. HRmaxPolar Fitne
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