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Amazon.com: Compatible with Fitbit Dongle USB Wireless Sync Dongle for Charge 4/Varsa 2/Versa Lite/Ace2/Charge 3/Flex 2/Charge 2/Alta HR /Blaze/Surge/Charge HR/Flex/One Tracke : Electronics
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Amazon.com: Compatible for Fitbit Alta HR Charger,KingAcc 1-Pack 3.3ft/1m Replacement USB Charging Cable Cradle Dock Adapter for Fitbit Alta HR Fitness Wristband Smart Fitness Watch(Not for Alta) : Cell Phones & Accessories
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