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Polar RS300sd Running Computer

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. The Polar RS300X Running Computer measures your heart rate combined with speed and distance and helps you to train at the right intensity with personal training zones. It disp (more...)