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POLAR Grit X - Rugged Multisport GPS Smart Watch - Ultra-Long Battery Life, Wrist-Based Heart Rate, Military-Level Durability, Sleep and Recovery, Navigation - Trail Running, Mountain Biking
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Polar M430 In-Depth Review | DC Rainmaker
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Polar M430 HR Review | Tested by GearLab
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Review: Running or not, you'll want the Polar M430 on your wrist | Ars Technica
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Polar M430 HR Review | Tested by GearLab
Polar M430 GPS Running Watch
Polar M430 In-Depth Review | DC Rainmaker
Polar M430 Review: Fitness Substance Over Smartwatch Style | Digital Trends
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Polar M430 In-Depth Review | DC Rainmaker
Review: Running or not, you'll want the Polar M430 on your wrist | Ars Technica
Battery life and verdict - Polar M430 review | TechRadar
