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Get all the essential heart rate features with this good-looking and simple-to-use training computer. RS300X is compatible with S1 foot pod™ and G1 GPS sensor, so you can combine heart rate with speed and distance. Only then you can truly make sense of your training and be sure it's worth all the effort.

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™