![Polar M430, to repeat the success of the M400, but with optical pulse sensor - Correr una Maratón - Review of Garmin, Polar, Suunto, Fitbit... Polar M430, to repeat the success of the M400, but with optical pulse sensor - Correr una Maratón - Review of Garmin, Polar, Suunto, Fitbit...](https://www.correrunamaraton.com/wp-content/uploads/2017/04/polar-m430-4.jpg)
Polar M430, to repeat the success of the M400, but with optical pulse sensor - Correr una Maratón - Review of Garmin, Polar, Suunto, Fitbit...
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Polar M400 review: A feature-packed GPS running watch that can also track your steps and sleep - CNET
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