Polar M400 Review

The Polar M400 fitness tracker logs your outdoor runs with GPS and measures how much activity you get all day long. It's a compelling choice for runners, but a little too chunky to work as an all-day wearable.
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Quick Review — Polar M400. Having experienced both the Polar M400…, by Ben Floro

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Polar M400 Review

Polar M400 Review

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Polar M400 review

Polar M400 Review

Polar M400 Review