Check the listing for details. Replacement USB Wireless Sync Dongle Compatible for Fitbit Activity Trackers. Color: Black, Condition: New. Listed at 12.95 USD. Replacement USB Wireless Sync Dongle Compatible for Fitbit Activity Tracker Features: 1. A replacement for the fitbit cable: Bluetooth USB. 2. Compatible for Fitbit Versa/ Alta/ Blaze/ Charge/ Charge HR/ Charge 2/ Surge/ Flex/ One/ Force Activity Trackers . 3. Fast charging reversible: Plug and unplug easily without checking for the connector orientation. 4. Chip setting inside: Over currency protection inside. 5. Color: Black 6. Type: Fitbit Dongle 7. Weight: approx. 10g 8. Note:Fitbit Dongle is only compatible with Windows 7 for Fitbit Alta HR/Blaze/Alta/Flex 2/Charge 2/Charge/Surge/Charge HR, compatible with Windows XP and below for Fitbit One/Zip/Flex/Force 9. This fitbit dongle is only compatible with Windows 7 for Flex 2.The model which can be compatible with Windows 8 and 10 is in development. How does this dongle work: 1. Download fitbit app at first. 2. Then open the dongle. 3. Open the app you`ve downloaded. 4. Operate in steps according to the instruction. 5. Please remember to download the fibit app before plug it into the computer. Note: 1. That only within 1 meter can the dongle better sync with your fitbit !!! 2. This item does NOT FIT for fitbit ZIP model. Package Content: 1 x Wireless Sync Dongle in opp bag