QIBOX Replacement USB Charger Charging Cable for Fitbit Charge HR Band Wireless Activity Bracelet Charging Cord 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.