Fitbit wireless sync dongle (models include FB150 and FB152OD).
Key Information
Purpose: The dongle plugs into a computer's USB port, allowing older Fitbit activity trackers (such as the Fitbit One, Flex, Charge HR, etc.) to wirelessly sync data to the Fitbit dashboard without needing a smartphone.
Connectivity: It provides a stable connection, which was especially useful for computers that lack built-in Bluetooth capabilities.