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Hey there @berlin60, it's nice to see new members around!
if the computer you are running is not Windows 10 or doesn't have the new Bluetooth 4.0 interface, then the Fitbit Dongle is needed.
You can use a Windows 10 computer or Mac computer with integrated bluetooth and install the Fitbit software, this way you can setup and sync your tracker. You can also make use of compatible mobile devices to do this.
Hope this clarifies your question!
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