Fitbit Wireless Sync Dongle, Lucco Bluetooth USB Replacement for Fitbit Charge 2/ HR, Fitbit Alta/ Blaze/ Surge/ One / Flex/ Force/ Charge Wristband Fitness Activity Tracker Compatible with Fitbit Charge 2/ HR, Fitbit Alta/ Blaze/ Surge/ One / Flex/ Force/ Charge Wristband Fitness Activity Tracker. NOT FIT for Fitbit ZIP The Fitbit sync dongle with output short circuit, over voltage and overload filter protection prevent your device being damaged by overcurrent Fitbit bluetooth USB dongle replace the Fitbit cable, ynchronize Fitbit data wirelessly The best syncing distance between the Fitbit tracker and dongle is within 1 meter(3.3 feet) Package included: 1 x bluetooth for Fitbit (wristband is not included)