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The CS300 is the optimum choice for cyclists who like to get their
cardio fitness from sports other than just cycling.

Its versatility means you can either wear the CS300 wrist unit
during indoor fitness training or mount it onto your bike when cycling.

Measures your current, average and maximum speed Shows you how many
calories and the percentage of fat you've burned Get guidance for
optimal training intensity based on your body's daily condition
Use polarpersonaltrainer.com as your training log to analyze your
long term progression and improvement