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A few quick thoughts on Fitbit's new activity trackers, GPS watch (with optical heart rate!) | DC Rainmaker
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Fitbit Charge 4 Special Edition Activity Tracker GPS + Heart Rate Granite Reflective FB417BKGY - Best Buy
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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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Fitbit Charge 5 Advanced Fitness & Health Tracker with Built-in GPS, Stress Management Tools, Sleep Tracking, 24/7 Heart Rate and More, Lunar White/Soft Gold, One Size (S &L Bands Included) : Electronics
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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
Fitbit Charge 4: powerful fitness tracker let down by its poor screen – in black and white – and connectivity issues | South China Morning Post
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Fitbit Sense Fitness Tracker with Step Counter, Heart Rate Monitor and Gps Enabled in the Fitness Trackers department at Lowes.com
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