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replacement wireless Sync USB Dongle for Fitbit flex, One, Zip, Force, Charge, HR, Surge FB150|usb usb|usb usb cusb replace - AliExpress
Why does the Charge 2 not come with a USB dongle? - Fitbit Community
For Fitbit Dongle Wireless Synchronized Usb Dongle Bluetooth Receiver For Fitbit Versa Alta Blaze Charge Charge Hr Charge 2 - Smart Accessories - AliExpress