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Amazon.com: Fitbit Charge 4 Fitness and Activity Tracker with Built-in GPS, Heart Rate, Sleep & Swim Tracking, Black/Black, One Size (S &L Bands Included) : Sports & Outdoors
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Amazon.com: Fitbit Charge 3 Fitness Activity Tracker, Graphite/Black, One Size (S and L Bands Included) : Sports & Outdoors
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Fitbit Charge 4 Review: New running smarts tested inc. GPS, heart rate and Active Zone Minutes - YouTube
Mobile Monsters - Make every minute count with Fitbit Charge 3—a health & fitness tracker that packs built-in GPS and personalised heart rate features into a sleek, comfortable wristband. Going for K3,150.
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