i-smile [Pack of 2] Replacement USB Charging Cable for Fitbit One Only (12cm) - Third Party Charger Fit for Fitbit One only! Does not for Fitbit Flex, Fitbit Force, Fitbit Charge or other models! it was designed with USB 2.0 and charger pins, TPU material, durable and strong USB 2.0 connector. Replacement for lost or damaged cables. Ideal for travel or to keep at the office. Package includes: 1 x Charging Cable for Fitbit One Only (No Tracker ). Length: about 12cm. Please note this is third party charger , not officail charger, it is a little bit different in size, material and appearance than the official charger.