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updated 12:53 PM EDT 05.06.13
Fitbit Flex fitness tracker ships with Bluetooth 4.0 synchronization
Fitbit has started shipping its first wrist-based activity tracker. The Fitbit Flex follows the Jawbone Up and the Nike FuelBand in providing tracking of activities and sleep patterns from the wrist, and like other Fitbit trackers in the entire range, is able to sync over Bluetooth 4.0 through iOS and Android devices, as well as using the provided Bluetooth dongle with a PC.