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Amazon.com: 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 : Everything Else
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Polar Grit X in test: Robust and light, multisport watch with Komoot integration and long running time - NotebookCheck.net Reviews
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