Fitbit Product Experts Alumni are retired members of the Fitbit Product Expert Program. Learn more
You should have gotten a dongle with your One if you bought it new.
If you don't have a dongle, you can set it up with the Windows 10 Fitbit App, provided your computer has bluetooth LE.
I hope this helps.
Frank | Washington, USA
Fitbit One, Ionic, Charge 2, Alta HR, Blaze, Surge, Flex, Flex 2, Zip, Ultra, Flyer, Aria, Aria 2 - Windows 10, Windows Phone
Take a look at the Fitbit help site for further assistance and information.
Best Answer