2 Pack Replacement Charging Cable Cord for Fitbit Charge HR Wireless Activity Wristband Bracelet only (Fitbit Charge HR) by SENHAI-Black 100% New and High Quality cord for fitbit hr. Extra Replacement Charging Cable to Give Your Fitbit Charge HR Wristband a Boost in the Office,at Home or in Travels. Quality Charge Cable with Voltage Regulator to Charge Your Fitbit Charge HR more Securely When Connected to USB Power Source on PC, Mac, Laptop or Notebook. The intelligent chip could prevent it from over-charging, over-heating, short circuit. Feature: This charger interface is designed to both sides which could automatically identify the positive and negative pole to charge the wristband.