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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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Silicone Wristband for Polar M400/ Polar M430 GPS Running Smart Watch,Replacement Watch Strap for Polar M400/ M430 (White) | Walmart Canada
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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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