Heart Rate Monitor RS300X sd
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.

Features:

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™