Replacement USB charger compatible with Fitbit Charge 2 Heart Rate Fitness only, not other models. No reset function. Note: Fitbit Charge 2 fitness tracker and wristband are not included. Safety design: This Fitbit Charge 2 charger has a voltage regulator inside (built-in voltage regulator) to protect your Fitbit from damage by overloading and short circuiting. NOTE: Please connect to the USB port of your computer, laptop, Mac or notebook. When connected to the adapter, the current of the adapter must not exceed 1A. High quality and durable: Made of high quality cord, this replacement Fitbit Charge 2 charging cable can withstand 2000 insertion and extraction tests. Compact and lightweight design, convenient for travelers and business users Cable length: 55 cm. Extra long length for wide coverage. Extra replacement charging cable for your Fitbit Charge 2 fitness tracker to power up in the office, at home, in the car or on the go Material: TPE ABS