Tougs Black USB Charging Charger Cable for Fitbit Charge Hr Wireless Activity Wristband Extra replacement charging cable to give your fitbit charge hr wristband a boost in the office, at home, in car or in travels Stable Performance. We suggest that you connect it to USB power source on PC, laptop, notebook, beacause this charging method can provide high efficiency and high stability charging experience for you. More Safer.Built-in Voltage Regulator(PTC), it can protect your Fitbit Charge HR from being damaged by overcurrent. Note: This cable work for the fitbit charge hr, not for the fitbit flex/charge/surge/force/one, please pay attention to it before you are buying