Fitbit Charge HR Charger, QIBOX Replacement USB Charging Cable for Fitbit Charge HR Wireless Activity Wristband 1FT + 3FT (2-Pack) QIBOX Authentic Charger for Fitbit Charge HR Fitness Wireless Activity Wristband Different from other unauthentic poor quality charging cables, it has a PTC inside to prevent your Fitbit Charge HR from being damaged by overcurrent. It is fully functional just as the original cable. Fits perfectly for your Fitbit Charge HR Fitness Wireless Activity Wristband Made of ROHS materials. Premium quality guaranteed.