Fitbit starts study to test if devices can detect irregular heart rhythms, match rival Apple's Watch feature | South China Morning Post
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Amazon.com: Pack 3 Silicone Bands for Fitbit Charge 4 / Charge 3 / Charge 3 SE Replacement Wristbands for Women Men Small Large(Without Tracker) (Large: for 7.1"-8.7" Wrists, Black+Navy Blue+Slate Grey) : Electronics
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1 Pack Charger for Fitbit Versa/Versa Lite/Versa SE (Not for Versa 2/3), Replacement Charger Dock Stand Cradle Adapter for Fitbit Versa Watch, Black - Walmart.com
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